feuerwerk/tests/core/soundfx.test.ts

/**
 * A sound FX asset (#311) is a graph a sound is played through: Input, effects, Output. It never
 * runs as a behavior does – the compiler turns it into the line of effects a voice passes.
 */
import { describe, expect, it } from 'vitest';
import { buildAsset, CreateAssetCommand, CreateSoundCommand } from '../../src/core/commands/assetCommands';
import { RenamePortCommand, SetPortDefaultCommand } from '../../src/core/commands/portCommands';
import { callProblem, resolveDef, soundFxParamsMismatch } from '../../src/core/graph';
import { type DeclaredPort, portsCompatible } from '../../src/core/graph/Graph';
import { graphLookup } from '../../src/core/model/graphLookup';
import type { PropertyBag } from '../../src/core/model/Properties';
import type { BehaviorAsset, SoundFxAsset } from '../../src/core/model/Asset';
import { isPlaceableType } from '../../src/core/model/AssetTypes';
import { assetRefChoices } from '../../src/core/properties/assetRef';
import { compileSoundFx, soundFxBuildFor } from '../../src/core/soundfx/compile';
import {
  dampingCutoff,
  EMPTY_PLAN,
  type FxChain,
  fxChainOf,
  type FxDelay,
  fxLatencyOf,
  type FxPlan,
  fxRings,
  type FxStage,
  fxTailOf,
  type FxVoice,
  delayShares,
  impulsesOf,
  SOUND_FX_NODES,
  SoundFxReverb,
  stageLatency,
} from '../../src/core/soundfx/nodes';
import { saturationAutoGain } from '../../src/core/soundfx/saturation';
import { deserializeProject } from '../../src/core/store/serialize';
import type { AudioSink } from '../../src/runtime/systems/Audio';
import { paletteEntries } from '../../src/editor/graph/paletteEntries';
import {
  graphEditor,
  makeBehavior,
  makeProject,
  makeSpriteScene,
  place,
  type ProjectFixture,
  roundTrip,
  startWorld,
} from '../helpers';

const FILE = `${'a1'.repeat(32)}.wav`;
const OTHER_FILE = `${'b2'.repeat(32)}.wav`;

/** What a sound with no FX goes through. */
const DRY: FxChain = { pitch: 0, shifted: false, stages: [] };

/** The level of a gain or filter stage. */
const gainOf = (stage: FxStage | undefined) => (stage && 'gain' in stage ? stage.gain : undefined);

/** The pitch of a sound that is not mixed. */
const pitchOf = <T extends FxChain | FxPlan>(sound: T) => ('pitch' in sound ? sound.pitch : undefined);

function makeFx(f: ProjectFixture = makeProject()) {
  const command = new CreateAssetCommand('soundfx', 'Cave');
  f.stack.execute(command);
  const fx = command.asset as SoundFxAsset;
  return { ...f, fx, edit: graphEditor(f, fx as unknown as BehaviorAsset) };
}

/** Input, the given effects in a row, Output. */
function line(effects: { type: string; params?: PropertyBag }[]) {
  const f = makeFx();
  const input = f.edit.addNode('SoundFxInput');
  let tail = input;
  for (const effect of effects) {
    const node = f.edit.addNode(effect.type, effect.params ?? {});
    f.edit.connect(tail, 'out', node, 'in');
    tail = node;
  }
  const output = f.edit.addNode('SoundFxOutput');
  f.edit.connect(tail, 'out', output, 'in');
  return { ...f, input, output };
}

describe('the sound FX asset', () => {
  it('is not placeable, starts with an empty graph and is what the fx picker offers', () => {
    expect(isPlaceableType('soundfx')).toBe(false);
    expect(buildAsset('soundfx', 'FX')).toMatchObject({ type: 'soundfx', graph: { nodes: [], edges: [] } });
    const f = makeFx();
    f.stack.execute(new CreateSoundCommand('Jump', FILE));
    expect(assetRefChoices(f.project, ['soundfx']).map((a) => a.id)).toEqual([f.fx.id]);
  });

  it('survives a round trip and keeps only sound FX nodes', () => {
    const f = line([{ type: 'SoundFxGain', params: { gain: -6 } }]);
    expect(roundTrip(f.project)).toEqual(f.project);

    const loaded = deserializeProject({
      name: 'P',
      assets: [
        {
          id: 'fx',
          type: 'soundfx',
          name: 'FX',
          graph: {
            nodes: [
              { id: 'a', type: 'SoundFxInput', x: 0, y: 0, params: {} },
              { id: 'b', type: 'OnStart', x: 0, y: 0, params: {} },
            ],
            edges: [],
          },
        },
      ],
    });
    expect((loaded.assets[0] as SoundFxAsset).graph.nodes.map((n) => n.id)).toEqual(['a']);
  });

  it('carries sound only from a sound port into a sound port', () => {
    expect(portsCompatible('audio', 'audio')).toBe(true);
    expect(portsCompatible('audio', 'any')).toBe(false);
    expect(portsCompatible('number', 'audio')).toBe(false);
    expect(portsCompatible('any', 'audio')).toBe(false);
  });

  it('offers its effects, Input and Output once each, and none of them in a behavior', () => {
    const f = makeFx();
    const ids = () => paletteEntries(f.project, f.fx).map((e) => e.id);
    expect(ids()).toEqual([
      'SoundFxInput',
      'SoundFxOutput',
      'SoundFxGain',
      'SoundFxPitch',
      'SoundFxEq',
      'SoundFxParametricEq',
      'SoundFxFilter',
      'SoundFxMix',
      'SoundFxDelay',
      'SoundFxBitcrusher',
      'SoundFxPhaser',
      'SoundFxFlanger',
      'SoundFxPan',
      'SoundFxCompressor',
      'SoundFxLimiter',
      'SoundFxSaturation',
      'SoundFxTremolo',
      'SoundFxVibrato',
      'SoundFxReverb',
    ]);
    f.edit.addNode('SoundFxInput');
    f.edit.addNode('SoundFxOutput');
    expect(ids()).toEqual([
      'SoundFxGain',
      'SoundFxPitch',
      'SoundFxEq',
      'SoundFxParametricEq',
      'SoundFxFilter',
      'SoundFxMix',
      'SoundFxDelay',
      'SoundFxBitcrusher',
      'SoundFxPhaser',
      'SoundFxFlanger',
      'SoundFxPan',
      'SoundFxCompressor',
      'SoundFxLimiter',
      'SoundFxSaturation',
      'SoundFxTremolo',
      'SoundFxVibrato',
      'SoundFxReverb',
    ]);

    const behavior = makeBehavior(f, 'Logic');
    expect(paletteEntries(f.project, behavior).some((e) => e.def.category === 'sound')).toBe(false);
  });
});

describe('compiling a sound FX graph', () => {
  it('needs an Output, and an Output fed from the Input', () => {
    const f = makeFx();
    expect(compileSoundFx(f.fx.graph)).toMatchObject({ compiled: null, reason: 'No Output node' });

    const output = f.edit.addNode('SoundFxOutput');
    const gain = f.edit.addNode('SoundFxGain');
    f.edit.connect(gain, 'out', output, 'in');
    const build = compileSoundFx(f.fx.graph);
    expect(build.compiled).toBeNull();
    expect(build.problems[gain.id]).toBe('Nothing comes in: connect it to the Input');
  });

  it('passes the sound on untouched through Input and Output alone', () => {
    const build = compileSoundFx(line([]).fx.graph);
    expect(build).toMatchObject({ compiled: EMPTY_PLAN, effects: 0, reason: '' });
    expect(fxChainOf(build.compiled!)).toEqual(DRY);
  });

  it('turns every node on the line into its stages, in order', () => {
    const f = line([
      { type: 'SoundFxGain', params: { gain: -6 } },
      { type: 'SoundFxPitch', params: { semitones: 12 } },
      { type: 'SoundFxEq', params: { low: 6, high: -3 } },
      { type: 'SoundFxPitch', params: { semitones: -5 } },
    ]);
    const build = compileSoundFx(f.fx.graph);
    expect(build.effects).toBe(4);
    const chain = fxChainOf(build.compiled!);
    expect(pitchOf(chain)).toBe(7);
    expect(chain.stages).toHaveLength(3);
    expect(chain.stages[0]!.kind).toBe('gain');
    expect(gainOf(chain.stages[0])).toBeCloseTo(0.501, 3);
    expect(chain.stages.slice(1)).toEqual([
      { kind: 'filter', filter: 'lowshelf', frequency: 80, gain: 6, q: 1 },
      { kind: 'filter', filter: 'highshelf', frequency: 12000, gain: -3, q: 1 },
    ]);
  });

  it('leaves out what does nothing and holds a value to its row', () => {
    const quiet = compileSoundFx(line([{ type: 'SoundFxGain' }, { type: 'SoundFxEq' }]).fx.graph);
    expect(quiet.compiled).toEqual(EMPTY_PLAN);
    expect(quiet.effects).toBe(2);

    const loud = fxChainOf(
      compileSoundFx(line([{ type: 'SoundFxGain', params: { gain: 200 } }]).fx.graph).compiled!,
    );
    expect(gainOf(loud.stages[0])).toBeCloseTo(10 ** (24 / 20));
  });

  it('ignores a node hanging off the line', () => {
    const f = line([{ type: 'SoundFxPitch', params: { semitones: 3 } }]);
    const aside = f.edit.addNode('SoundFxGain', { gain: -20 });
    f.edit.connect(f.input, 'out', aside, 'in');
    const build = compileSoundFx(f.fx.graph);
    expect(fxChainOf(build.compiled!)).toEqual({ pitch: 3, shifted: true, stages: [] });
    expect(build.effects).toBe(1);
  });
});

describe('a Mix in a sound FX graph (#316)', () => {
  /** Input → Pitch +12 → Mix a, Input → Gain -6 → Mix b, Mix → EQ → Output. */
  function forked(mix: Record<string, number> = {}) {
    const f = makeFx();
    const input = f.edit.addNode('SoundFxInput');
    const pitch = f.edit.addNode('SoundFxPitch', { semitones: 12 });
    const gain = f.edit.addNode('SoundFxGain', { gain: -6 });
    const node = f.edit.addNode('SoundFxMix', mix);
    const eq = f.edit.addNode('SoundFxEq', { low: 6 });
    const output = f.edit.addNode('SoundFxOutput');
    f.edit.connect(input, 'out', pitch, 'in');
    f.edit.connect(input, 'out', gain, 'in');
    f.edit.connect(pitch, 'out', node, 'a');
    f.edit.connect(gain, 'out', node, 'b');
    f.edit.connect(node, 'out', eq, 'in');
    f.edit.connect(eq, 'out', output, 'in');
    return { ...f, input, mix: node };
  }

  it('joins two ways from the Input, each with its own pitch, half each by default', () => {
    const build = compileSoundFx(forked().fx.graph);
    expect(build).toMatchObject({ effects: 4, reason: '' });
    const chain = fxChainOf(build.compiled!);
    expect(chain).toMatchObject({
      mix: 0.5,
      a: { pitch: 12, stages: [] },
      b: { pitch: 0, stages: [{ kind: 'gain' }] },
      stages: [{ kind: 'filter', filter: 'lowshelf', gain: 6 }],
    });
  });

  it('is only the one sound at 0 or 1, with what follows the Mix', () => {
    expect(fxChainOf(compileSoundFx(forked({ mix: 0 }).fx.graph).compiled!)).toMatchObject({
      pitch: 12,
      stages: [{ kind: 'filter' }],
    });
    const b = fxChainOf(compileSoundFx(forked({ mix: 5 }).fx.graph).compiled!);
    expect(b).toMatchObject({ pitch: 0, stages: [{ kind: 'gain' }, { kind: 'filter' }] });
  });

  it('says its curve only where it is "Both at center", and is still one sound at 0 or 1', () => {
    expect(fxChainOf(compileSoundFx(forked().fx.graph).compiled!)).not.toHaveProperty('curve');
    const f = forked();
    f.mix.params.curve = 'both';
    expect(fxChainOf(compileSoundFx(f.fx.graph).compiled!)).toMatchObject({ mix: 0.5, curve: 'both' });
    f.mix.params.mix = 0;
    expect(fxChainOf(compileSoundFx(f.fx.graph).compiled!)).toMatchObject({ pitch: 12 });
  });

  it('takes its share from a parameter, held between 0 and 1, and keeps both ways for it (#315)', () => {
    const f = forked();
    f.input.ports = [{ key: 'blend', kind: 'number', default: 0.25 }];
    f.edit.connect(f.input, 'blend', f.mix, 'mix');
    const plan = compileSoundFx(f.fx.graph).compiled!;
    expect(fxChainOf(plan)).toMatchObject({ mix: 0.25 });
    expect(fxChainOf(plan, { blend: 0.8 })).toMatchObject({ mix: 0.8 });
    expect(fxChainOf(plan, { blend: -3 })).toMatchObject({ mix: 0, a: { pitch: 12 }, b: { pitch: 0 } });
    expect(fxChainOf(plan, { blend: 3 })).toMatchObject({ mix: 1, a: { pitch: 12 }, b: { pitch: 0 } });
  });

  it('hands a Pitch behind it to both of its sounds', () => {
    const f = forked();
    const output = f.fx.graph.nodes.find((n) => n.type === 'SoundFxOutput')!;
    const eq = f.fx.graph.nodes.find((n) => n.type === 'SoundFxEq')!;
    f.fx.graph.edges = f.fx.graph.edges.filter((e) => e.to.node !== output.id);
    const after = f.edit.addNode('SoundFxPitch', { semitones: -5 });
    f.edit.connect(eq, 'out', after, 'in');
    f.edit.connect(after, 'out', output, 'in');
    expect(fxChainOf(compileSoundFx(f.fx.graph).compiled!)).toMatchObject({
      a: { pitch: 7 },
      b: { pitch: -5 },
      stages: [{ kind: 'filter' }],
    });
  });

  it('needs both of its sounds', () => {
    const f = forked();
    f.fx.graph.edges = f.fx.graph.edges.filter((e) => !(e.to.node === f.mix.id && e.to.port === 'b'));
    const build = compileSoundFx(f.fx.graph);
    expect(build.compiled).toBeNull();
    expect(build.problems[f.mix.id]).toBe('Nothing comes in: connect it to the Input');
  });
});

describe('a Delay in a sound FX graph (#327)', () => {
  it('echoes at its defaults, the damping a cutoff evenly in octaves between 20 kHz and 500 Hz', () => {
    const chain = fxChainOf(compileSoundFx(line([{ type: 'SoundFxDelay' }]).fx.graph).compiled!);
    expect(chain.stages).toEqual([
      { kind: 'delay', time: 0.25, feedback: 0.4, damping: dampingCutoff(0.3), mix: 0.5, pingPong: false },
    ]);
    expect([dampingCutoff(0), dampingCutoff(0.5), dampingCutoff(1)]).toEqual([
      20000,
      expect.closeTo(Math.sqrt(20000 * 500)),
      expect.closeTo(500),
    ]);
  });

  it('holds its numbers to their rows, never a feedback of 1, and carries ping-pong', () => {
    const chain = fxChainOf(
      compileSoundFx(
        line([
          { type: 'SoundFxDelay', params: { time: 9, feedback: 2, damping: -1, mix: 3, pingPong: true } },
        ]).fx.graph,
      ).compiled!,
    );
    expect(chain.stages).toEqual([
      { kind: 'delay', time: 2, feedback: 0.95, damping: 20000, mix: 1, pingPong: true },
    ]);
  });

  it('is left out at a typed-in mix of 0, and kept for a mix from a parameter', () => {
    const off = compileSoundFx(line([{ type: 'SoundFxDelay', params: { mix: 0 } }]).fx.graph);
    expect(off.compiled).toEqual(EMPTY_PLAN);
    const fed = withParam('SoundFxDelay', 'mix', [{ key: 'wet', kind: 'number' }]);
    const plan = soundFxBuildFor(fed.fx).compiled!;
    expect(fxChainOf(plan).stages).toMatchObject([{ kind: 'delay', mix: 0 }]);
    expect(fxChainOf(plan, { wet: 0.7 }).stages).toMatchObject([{ kind: 'delay', mix: 0.7 }]);
  });

  it('takes its time from a parameter, held to two seconds', () => {
    const f = withParam('SoundFxDelay', 'time', [{ key: 'echo', kind: 'number', default: 0.5 }]);
    const plan = soundFxBuildFor(f.fx).compiled!;
    expect(fxChainOf(plan).stages).toMatchObject([{ time: 0.5 }]);
    expect(fxChainOf(plan, { echo: 1 }).stages).toMatchObject([{ time: 1 }]);
    expect(fxChainOf(plan, { echo: 5 }).stages).toMatchObject([{ time: 2 }]);
  });

  it('synced to beats counts its time in quarter notes at the tempo of the voice (#332)', () => {
    const synced = (time: number) =>
      compileSoundFx(line([{ type: 'SoundFxDelay', params: { sync: 'beats', time } }]).fx.graph).compiled!;
    expect(synced(0.75)).toMatchObject({ stages: [{ beats: true, time: { value: 0.75 } }] });
    // A dotted eighth at 120 BPM, an eighth triplet at 100, a quarter where no tempo is said.
    expect(fxChainOf(synced(0.75), {}, 120).stages).toMatchObject([{ time: 0.375 }]);
    expect((fxChainOf(synced(1 / 3), {}, 100).stages[0] as FxDelay).time).toBeCloseTo(0.2);
    expect(fxChainOf(synced(1)).stages).toMatchObject([{ time: 0.5 }]);
    // A whole note at 60 BPM is 4 s: held to the 2 s of the line, as is a tempo out of its range.
    expect(fxChainOf(synced(4), {}, 60).stages).toMatchObject([{ time: 2 }]);
    expect(fxChainOf(synced(1), {}, 1000).stages).toMatchObject([{ time: 0.15 }]);
    // In seconds the tempo changes nothing.
    const seconds = compileSoundFx(line([{ type: 'SoundFxDelay', params: { time: 0.75 } }]).fx.graph);
    expect(fxChainOf(seconds.compiled!, {}, 60).stages).toMatchObject([{ time: 0.75 }]);
  });
});

describe('a Bitcrusher in a sound FX graph (#322)', () => {
  it('crushes at its defaults and holds its numbers to their rows', () => {
    const at = (params?: Record<string, number>) =>
      fxChainOf(compileSoundFx(line([{ type: 'SoundFxBitcrusher', params }]).fx.graph).compiled!).stages;
    expect(at()).toEqual([{ kind: 'crush', bits: 8, rate: 8000, mix: 1 }]);
    expect(at({ bits: 0, rate: 1e6, mix: 2 })).toEqual([{ kind: 'crush', bits: 1, rate: 48000, mix: 1 }]);
    expect(at({ bits: 3.5, rate: 50 })).toEqual([{ kind: 'crush', bits: 3.5, rate: 100, mix: 1 }]);
  });

  it('is left out at a typed-in mix of 0, and kept for bits from a parameter', () => {
    expect(
      compileSoundFx(line([{ type: 'SoundFxBitcrusher', params: { mix: 0 } }]).fx.graph).compiled,
    ).toEqual(EMPTY_PLAN);
    const f = withParam('SoundFxBitcrusher', 'bits', [{ key: 'crunch', kind: 'number', default: 12 }]);
    const plan = soundFxBuildFor(f.fx).compiled!;
    expect(fxChainOf(plan).stages).toMatchObject([{ kind: 'crush', bits: 12 }]);
    expect(fxChainOf(plan, { crunch: 2.5 }).stages).toMatchObject([{ kind: 'crush', bits: 2.5 }]);
    expect(fxChainOf(plan, { crunch: 40 }).stages).toMatchObject([{ kind: 'crush', bits: 16 }]);
  });
});

describe('a Phaser and a Flanger in a sound FX graph (#341)', () => {
  const at = (type: string, params?: Record<string, string | number>) =>
    fxChainOf(compileSoundFx(line([{ type, params }]).fx.graph).compiled!).stages;

  it('play at their defaults and hold their numbers to their rows', () => {
    expect(at('SoundFxPhaser')).toEqual([
      { kind: 'phaser', stages: 4, frequency: 800, rate: 0.5, depth: 2, feedback: 0.4, mix: 1 },
    ]);
    expect(at('SoundFxPhaser', { stages: '12', frequency: 5, feedback: 2, depth: -1 })).toMatchObject([
      { stages: 12, frequency: 20, feedback: 0.95, depth: 0 },
    ]);
    expect(at('SoundFxPhaser', { stages: '5' })).toMatchObject([{ stages: 4 }]);
    expect(at('SoundFxFlanger')).toEqual([
      { kind: 'flanger', offset: 1, sweep: 0, rate: 0.25, depth: 2, feedback: 0.5, mix: 1 },
    ]);
    expect(at('SoundFxFlanger', { offset: 50, sweep: -500, depth: 99 })).toMatchObject([
      { offset: 10, sweep: -125, depth: 10 },
    ]);
  });

  it('are left out at a typed-in mix of 0, and kept for a mix from a parameter', () => {
    expect(at('SoundFxPhaser', { mix: 0 })).toEqual([]);
    expect(at('SoundFxFlanger', { mix: 0 })).toEqual([]);
    const f = withParam('SoundFxFlanger', 'mix', [{ key: 'wet', kind: 'number', default: 0 }]);
    const plan = soundFxBuildFor(f.fx).compiled!;
    expect(fxChainOf(plan).stages).toMatchObject([{ kind: 'flanger', mix: 0 }]);
    expect(fxChainOf(plan, { wet: 0.3 }).stages).toMatchObject([{ kind: 'flanger', mix: 0.3 }]);
  });
});

describe('a Pan in a sound FX graph (#319)', () => {
  const at = (params?: Record<string, number>) =>
    fxChainOf(compileSoundFx(line([{ type: 'SoundFxPan', params }]).fx.graph).compiled!).stages;

  it('moves the sound by its pan held to -1 to 1, and is left out at a typed-in 0', () => {
    expect(at({ pan: -0.5 })).toEqual([{ kind: 'pan', pan: -0.5 }]);
    expect(at({ pan: 3 })).toEqual([{ kind: 'pan', pan: 1 }]);
    expect(at()).toEqual([]);
    const f = withParam('SoundFxPan', 'pan', [{ key: 'side', kind: 'number', default: 0 }]);
    const plan = soundFxBuildFor(f.fx).compiled!;
    expect(fxChainOf(plan).stages).toEqual([{ kind: 'pan', pan: 0 }]);
    expect(fxChainOf(plan, { side: -2 }).stages).toEqual([{ kind: 'pan', pan: -1 }]);
  });
});

describe('a Compressor and a Limiter in a sound FX graph (#326)', () => {
  // The taps a Compressor keeps for its tab do nothing to the sound (#378).
  const at = (type: string, params?: Record<string, number | boolean>) =>
    fxChainOf(compileSoundFx(line([{ type, params }]).fx.graph).compiled!).stages.filter(
      (s) => s.kind !== 'tap',
    );

  it('tap a Compressor on both sides for its tab, a Limiter not (#378)', () => {
    const kinds = (type: string) =>
      fxChainOf(compileSoundFx(line([{ type }]).fx.graph).compiled!).stages.map((s) =>
        s.kind === 'tap' ? `tap ${s.at}` : s.kind,
      );
    expect(kinds('SoundFxCompressor')).toEqual(['tap in', 'compress', 'tap out']);
    expect(kinds('SoundFxLimiter')).toEqual(['limit']);
  });

  it('compress at their defaults, the gain after it worked out from makeup and auto-gain', () => {
    const [stage] = at('SoundFxCompressor', { threshold: -24, knee: 0, ratio: 4, makeup: 2, autoGain: true });
    expect(stage).toMatchObject({
      kind: 'compress',
      threshold: -24,
      knee: 0,
      ratio: 4,
      attack: 0.003,
      release: 0.25,
    });
    const db = (s: FxStage | undefined) => 20 * Math.log10((s as { gain: number }).gain);
    // 2 dB makeup and 4.5 dB of auto-gain on top, less the 10.8 dB the node adds itself.
    expect(db(stage)).toBeCloseTo(2 + 4.5 - 10.8, 3);
    expect(db(at('SoundFxCompressor', { threshold: -24, knee: 0, ratio: 4 })[0])).toBeCloseTo(-10.8, 3);
    expect(at('SoundFxCompressor', { ratio: 50, threshold: 10 })).toMatchObject([
      { ratio: 20, threshold: 0 },
    ]);
  });

  it('limit at their defaults, held to their rows, late by their look-ahead', () => {
    expect(at('SoundFxLimiter')).toEqual([
      { kind: 'limit', threshold: -6, ceiling: -1, release: 0.1, autoGain: 1 },
    ]);
    expect(at('SoundFxLimiter', { ceiling: 3, release: 0 })).toMatchObject([{ ceiling: 0, release: 0.001 }]);
    expect(at('SoundFxLimiter', { autoGain: false })).toMatchObject([{ autoGain: 0 }]);
    const [limit] = at('SoundFxLimiter');
    const [compress] = at('SoundFxCompressor');
    expect(stageLatency(limit!, 48000)).toBe(0.005);
    expect(stageLatency(limit!, 44100)).toBe(221 / 44100);
    expect(stageLatency(compress!, 44100)).toBe(0.006);
    expect(fxRings(compileSoundFx(line([{ type: 'SoundFxLimiter' }]).fx.graph).compiled!)).toBe(true);
  });

  it('make a chain as late as its latest way and the stages after it', () => {
    const limit = at('SoundFxLimiter')[0]!;
    const compress = at('SoundFxCompressor')[0]!;
    const way = (stages: FxStage[]) => ({ pitch: 0, shifted: false, stages });
    expect(fxLatencyOf({ mix: 0.5, a: way([limit]), b: way([]), stages: [compress] }, 48000)).toBeCloseTo(
      0.011,
      9,
    );
    expect(fxLatencyOf(way([]), 48000)).toBe(0);
  });

  it('read the auto-gain of a project from before it was a switch: on above 0 (#378)', () => {
    const gain = (autoGain?: number) =>
      (
        at('SoundFxCompressor', {
          threshold: -24,
          knee: 0,
          ratio: 4,
          ...(autoGain !== undefined && { autoGain }),
        })[0] as {
          gain: number;
        }
      ).gain;
    expect(gain(1)).toBeCloseTo(gain(0.5), 9);
    expect(gain(1)).toBeGreaterThan(gain(0));
    expect(gain(0)).toBeCloseTo(gain(), 9);
    expect(at('SoundFxLimiter', { autoGain: 0 })).toMatchObject([{ autoGain: 0 }]);
  });
});

describe('a Saturation in a sound FX graph (#323)', () => {
  const at = (params?: Record<string, string | number | boolean>) =>
    fxChainOf(compileSoundFx(line([{ type: 'SoundFxSaturation', params }]).fx.graph).compiled!).stages;

  it('bends at its defaults, its level from auto-gain, and is left out at a typed-in mix of 0', () => {
    const [stage] = at();
    expect(stage).toMatchObject({ kind: 'saturate', curve: 'soft', drive: 12, tone: 20000, mix: 1 });
    expect(20 * Math.log10((stage as { level: number }).level)).toBeCloseTo(
      saturationAutoGain('soft', 12),
      9,
    );
    expect(at({ mix: 0 })).toEqual([]);
    expect(at({ curve: 'nope' })).toMatchObject([{ curve: 'soft' }]);
  });

  it('adds its output on top of its auto-gain, and is late by the oversampling', () => {
    const levelDb = (s: FxStage | undefined) => 20 * Math.log10((s as { level: number }).level);
    const [stage] = at({ curve: 'hard', drive: 24, output: 6 });
    expect(levelDb(stage)).toBeCloseTo(6 + saturationAutoGain('hard', 24), 9);
    expect(levelDb(at({ curve: 'hard', drive: 24, output: 6, autoGain: false })[0])).toBeCloseTo(6, 9);
    expect(stageLatency(stage!, 48000)).toBe(0.004);
  });
});

describe('a Tremolo and a Vibrato in a sound FX graph (#320)', () => {
  const at = (type: string, params?: Record<string, string | number>) =>
    fxChainOf(compileSoundFx(line([{ type, params }]).fx.graph).compiled!).stages;

  it('swing at their defaults, the depth of a Tremolo from percent, and are left out at a typed-in depth of 0', () => {
    expect(at('SoundFxTremolo')).toEqual([{ kind: 'tremolo', shape: 'sine', rate: 5, depth: 0.5 }]);
    expect(at('SoundFxTremolo', { shape: 'square', depth: 150 })).toEqual([
      { kind: 'tremolo', shape: 'square', rate: 5, depth: 1 },
    ]);
    expect(at('SoundFxVibrato', { rate: 0, depth: 9 })).toEqual([
      { kind: 'vibrato', shape: 'sine', rate: 0.5, depth: 4 },
    ]);
    expect(at('SoundFxVibrato', { depth: 0 })).toEqual([]);
    expect(at('SoundFxTremolo', { depth: 0 })).toEqual([]);
  });

  it('a Vibrato is late by its delay and rings that long, a Tremolo is neither', () => {
    const [vibrato] = at('SoundFxVibrato', { shape: 'square', rate: 0.5, depth: 4 });
    const [tremolo] = at('SoundFxTremolo');
    expect(stageLatency(vibrato!, 48000)).toBeCloseTo(0.13, 2);
    expect(stageLatency(tremolo!, 48000)).toBe(0);
    expect(fxRings(compileSoundFx(line([{ type: 'SoundFxVibrato' }]).fx.graph).compiled!)).toBe(true);
    expect(fxRings(compileSoundFx(line([{ type: 'SoundFxTremolo' }]).fx.graph).compiled!)).toBe(false);
  });
});

describe('a Reverb in a sound FX graph (#328)', () => {
  const at = (params?: Record<string, string | number>) =>
    fxChainOf(compileSoundFx(line([{ type: 'SoundFxReverb', params }]).fx.graph).compiled!).stages;

  it('takes the numbers of its preset, or the ones typed in for Custom, and is left out at a mix of 0', () => {
    expect(at()).toEqual([{ kind: 'reverb', decay: 0.6, damping: 0.5, predelay: 0.005, mix: 0.3 }]);
    expect(at({ room: 'cave', decay: 9 })).toEqual([
      { kind: 'reverb', decay: 5, damping: 0.15, predelay: 0.04, mix: 0.3 },
    ]);
    expect(at({ room: 'custom', decay: 40, damping: 0.2, predelay: 0.1, mix: 1 })).toEqual([
      { kind: 'reverb', decay: 10, damping: 0.2, predelay: 0.1, mix: 1 },
    ]);
    expect(at({ mix: 0 })).toEqual([]);
  });

  it('shows the rows of Custom and of Sound only for them', () => {
    const f = line([{ type: 'SoundFxReverb' }]);
    const reverb = f.fx.graph.nodes.find((n) => n.type === 'SoundFxReverb')!;
    const inputs = (room: string) => {
      reverb.params.room = room;
      return resolveDef(reverb, f.fx.graph, graphLookup(f.project))!.inputs.map((p) => p.key);
    };
    expect(inputs('hall')).toEqual(['in', 'mix']);
    expect(inputs('custom')).toEqual(['in', 'mix', 'decay', 'damping', 'predelay']);
    expect(inputs('sound')).toEqual(['in', 'mix', 'predelay']);
    expect(SoundFxReverb.idleParams!({ room: 'sound' })).toEqual([]);
    expect(SoundFxReverb.idleParams!({ room: 'hall' })).toEqual(['impulse']);
  });

  it('takes the file of a sound as its impulse response, built again when that sound changes', () => {
    const f = line([{ type: 'SoundFxReverb' }]);
    const made = new CreateSoundCommand('Church', FILE);
    f.stack.execute(made);
    const reverb = f.fx.graph.nodes.find((n) => n.type === 'SoundFxReverb')!;
    reverb.params = { room: 'sound', impulse: made.asset.id, predelay: 0.02 };
    const plan = soundFxBuildFor(f.fx, f.project).compiled!;
    expect(fxChainOf(plan).stages).toMatchObject([{ kind: 'reverb', impulse: FILE, predelay: 0.02 }]);
    expect(impulsesOf(plan)).toEqual([FILE]);
    // Without the project there is no sound to find.
    expect(fxChainOf(compileSoundFx(f.fx.graph).compiled!).stages[0]).not.toHaveProperty('impulse');
    made.asset.file = OTHER_FILE;
    expect(impulsesOf(soundFxBuildFor(f.fx, f.project).compiled!)).toEqual([OTHER_FILE]);
  });

  it('rings its pre-delay and its decay, or as long as its sound', () => {
    const [made] = at({ room: 'hall' });
    expect(fxTailOf({ pitch: 0, shifted: false, stages: [made!] })).toBeCloseTo(2.52, 9);
    const sound: FxStage = { kind: 'reverb', decay: 1, damping: 0, predelay: 0.1, mix: 1, impulse: FILE };
    expect(fxTailOf({ pitch: 0, shifted: false, stages: [sound] }, () => 3)).toBeCloseTo(3.1, 9);
    expect(fxTailOf({ pitch: 0, shifted: false, stages: [sound] })).toBeCloseTo(10.1, 9);
  });
});

describe('Bypass and Wet (#354)', () => {
  /** Every effect, and how it says its wet: a row of its own, or the "mix" it had. */
  const EFFECTS: Record<string, 'wet' | 'mix'> = {
    SoundFxEq: 'wet',
    SoundFxBitcrusher: 'mix',
    SoundFxCompressor: 'wet',
    SoundFxDelay: 'mix',
    SoundFxFilter: 'wet',
    SoundFxFlanger: 'mix',
    SoundFxGain: 'wet',
    SoundFxLimiter: 'wet',
    SoundFxPan: 'wet',
    SoundFxParametricEq: 'wet',
    SoundFxPhaser: 'mix',
    SoundFxPitch: 'wet',
    SoundFxReverb: 'mix',
    SoundFxSaturation: 'mix',
    SoundFxTremolo: 'wet',
    SoundFxVibrato: 'wet',
  };
  const resolvedInputs = (type: string) => {
    const f = line([{ type }]);
    const node = f.fx.graph.nodes.find((n) => n.type === type)!;
    return resolveDef(node, f.fx.graph, graphLookup(f.project))!.inputs;
  };
  const stagesOf = (type: string, params: PropertyBag = {}) =>
    compileSoundFx(line([{ type, params }]).fx.graph).compiled!.stages;

  it('are on every effect, the wet of six of them the "mix" they had, and on nothing else', () => {
    for (const def of SOUND_FX_NODES) {
      const wet = EFFECTS[def.type];
      const inputs = wet ? resolvedInputs(def.type) : def.inputs;
      expect([def.type, def.params.some((p) => p.key === 'bypass')]).toEqual([def.type, wet !== undefined]);
      expect([def.type, inputs.filter((p) => p.label === 'Wet').map((p) => p.key)]).toEqual([
        def.type,
        wet ? [wet] : [],
      ]);
      expect([def.type, inputs.some((p) => p.label === 'Mix')]).toEqual([
        def.type,
        def.type === 'SoundFxMix',
      ]);
    }
    expect(Object.keys(EFFECTS)).toHaveLength(16);
  });

  it('bypassed, an effect is left out as if it were not there, and its node is drawn faded', () => {
    for (const type of Object.keys(EFFECTS)) {
      const on = { gain: -6, semitones: 5, low: 3, pan: 1, depth: 50, bands: [{ gain: 6 }] };
      expect([type, stagesOf(type, on).length > 0 || type === 'SoundFxPitch']).toEqual([type, true]);
      // The taps a Parametric EQ keeps do nothing to the sound (#374).
      const bypassed = compileSoundFx(line([{ type, params: { ...on, bypass: true } }]).fx.graph).compiled!;
      expect([type, { ...bypassed, stages: bypassed.stages.filter((s) => s.kind !== 'tap') }]).toEqual([
        type,
        EMPTY_PLAN,
      ]);
      const def = SOUND_FX_NODES.find((d) => d.type === type)!;
      expect([def.dimmed?.({ bypass: true }), def.dimmed?.({})]).toEqual([true, false]);
      expect([def.hiddenParams?.({ bypass: true }), def.hiddenParams?.({})]).toEqual([[], ['bypass']]);
    }
  });

  it('blends what a node adds with what arrives, all of it at 1 and none at a typed-in 0', () => {
    expect(stagesOf('SoundFxGain', { gain: -6 })).toEqual([{ kind: 'gain', db: { value: -6 } }]);
    expect(stagesOf('SoundFxGain', { gain: -6, wet: 0 })).toEqual([]);
    expect(stagesOf('SoundFxGain', { gain: -6, wet: 0.25 })).toEqual([
      { kind: 'wet', wet: { value: 0.25 }, stages: [{ kind: 'gain', db: { value: -6 } }] },
    ]);
    // Every band of an EQ in one blend, not each band on its own.
    const eq = stagesOf('SoundFxEq', { low: 6, high: -3, wet: 0.5 });
    expect(eq).toMatchObject([{ kind: 'wet', stages: [{ filter: 'lowshelf' }, { filter: 'highshelf' }] }]);
    // What came before the node stays outside the blend.
    const f = line([
      { type: 'SoundFxGain', params: { gain: 3 } },
      { type: 'SoundFxPan', params: { pan: 1, wet: 0.5 } },
    ]);
    expect(compileSoundFx(f.fx.graph).compiled!.stages).toMatchObject([
      { kind: 'gain' },
      { kind: 'wet', stages: [{ kind: 'pan' }] },
    ]);
  });

  it('takes its wet from a parameter and keeps the blend for it, also at 0 or 1 (#315)', () => {
    const f = line([{ type: 'SoundFxCompressor' }]);
    const compressor = f.fx.graph.nodes.find((n) => n.type === 'SoundFxCompressor')!;
    f.input.ports = [{ key: 'blend', kind: 'number', default: 0.5 }];
    f.edit.connect(f.input, 'blend', compressor, 'wet');
    const plan = compileSoundFx(f.fx.graph).compiled!;
    const stages = (params?: Record<string, number>) =>
      fxChainOf(plan, params).stages.filter((s) => s.kind !== 'tap');
    expect(stages()).toMatchObject([{ kind: 'wet', wet: 0.5, stages: [{ kind: 'compress' }] }]);
    expect(stages({ blend: 0 })).toMatchObject([{ kind: 'wet', wet: 0 }]);
    expect(stages({ blend: 7 })).toMatchObject([{ kind: 'wet', wet: 1 }]);
  });

  it('a blend is as late as what it blends and rings as long', () => {
    const [limit] = fxChainOf({ pitch: [], stages: stagesOf('SoundFxLimiter', { wet: 0.5 }) }).stages;
    expect(limit).toMatchObject({ kind: 'wet' });
    expect(stageLatency(limit!, 48000)).toBe(0.005);
    expect(fxRings({ pitch: [], stages: stagesOf('SoundFxLimiter', { wet: 0.5 }) })).toBe(true);
    expect(fxRings({ pitch: [], stages: stagesOf('SoundFxTremolo', { wet: 0.5 }) })).toBe(false);
  });

  it('the wet of a Filter comes after the gain a shelf adds to it', () => {
    const f = line([{ type: 'SoundFxFilter', params: { filter: 'lowshelf' } }]);
    const filter = f.fx.graph.nodes.find((n) => n.type === 'SoundFxFilter')!;
    const keys = () => resolveDef(filter, f.fx.graph, graphLookup(f.project))!.inputs.map((p) => p.key);
    expect(keys()).toEqual(['in', 'cutoff', 'q', 'gain', 'wet']);
    filter.params.filter = 'lowpass';
    expect(keys()).toEqual(['in', 'cutoff', 'q', 'wet']);
  });

  it('the wet of a Pitch takes its semitones from 0 up to all of them', () => {
    expect(
      pitchOf(
        fxChainOf(
          compileSoundFx(line([{ type: 'SoundFxPitch', params: { semitones: 12, wet: 0.5 } }]).fx.graph)
            .compiled!,
        ),
      ),
    ).toBe(6);
    expect(
      compileSoundFx(line([{ type: 'SoundFxPitch', params: { semitones: 12, wet: 0 } }]).fx.graph).compiled,
    ).toEqual(EMPTY_PLAN);

    const f = line([{ type: 'SoundFxPitch', params: { semitones: 12 } }]);
    const pitch = f.fx.graph.nodes.find((n) => n.type === 'SoundFxPitch')!;
    f.input.ports = [
      { key: 'up', kind: 'number', default: 7 },
      { key: 'blend', kind: 'number', default: 1 },
    ];
    f.edit.connect(f.input, 'blend', pitch, 'wet');
    const plan = compileSoundFx(f.fx.graph).compiled!;
    expect(pitchOf(fxChainOf(plan))).toBe(12);
    expect(pitchOf(fxChainOf(plan, { blend: 0.25 }))).toBe(3);
    expect(fxChainOf(plan, { blend: 0 })).toMatchObject({ pitch: 0, shifted: true });
    f.edit.connect(f.input, 'up', pitch, 'semitones');
    const both = compileSoundFx(f.fx.graph).compiled!;
    expect(pitchOf(fxChainOf(both, { up: -10, blend: 0.5 }))).toBe(-5);
  });

  it('a Delay crossfades: the sound alone at 0, both in full at 0.5, the echoes alone at 1', () => {
    expect([0, 0.25, 0.5, 0.75, 1].map(delayShares)).toEqual([
      { dry: 1, echo: 0 },
      { dry: 1, echo: 0.5 },
      { dry: 1, echo: 1 },
      { dry: 0.5, echo: 1 },
      { dry: 0, echo: 1 },
    ]);
    // An echo at wet 0.25 is half as loud as at 0.5, so one fewer of them is still heard.
    const tail = (mix: number) =>
      fxTailOf({
        pitch: 0,
        shifted: false,
        stages: [{ kind: 'delay', time: 1, feedback: 0.5, damping: 20000, mix, pingPong: false }],
      });
    expect(tail(0.5)).toBe(10);
    expect(tail(0.25)).toBe(9);
    expect(tail(1)).toBe(10);
  });
});

describe('the tail of a voice (#324)', () => {
  const echo = (time: number, feedback: number, mix: number): FxStage => ({
    kind: 'delay',
    time,
    feedback,
    damping: 20000,
    mix,
    pingPong: false,
  });
  const chain = (...stages: FxStage[]): FxChain => ({ pitch: 0, shifted: false, stages });

  it('is nothing without an echo', () => {
    expect(fxTailOf(DRY)).toBe(0);
    expect(fxTailOf(chain({ kind: 'gain', gain: 2 }))).toBe(0);
    expect(fxRings(EMPTY_PLAN)).toBe(false);
  });

  it('lasts until the last echo is 60 dB below the sound', () => {
    expect(fxTailOf(chain(echo(0.25, 0, 0.5)))).toBe(0.25);
    // 0.5^9 is 2 in 1000, 0.5^10 one in 1000 and a bit less: ten echoes are heard.
    expect(fxTailOf(chain(echo(0.25, 0.5, 1)))).toBe(2.5);
    expect(fxTailOf(chain(echo(0.1, 0.95, 1)))).toBeCloseTo(13.5);
    expect(fxTailOf(chain(echo(0.25, 0.9, 0.0001)))).toBe(0);
  });

  it('adds up echoes behind each other and takes the longer way of a Mix', () => {
    expect(fxTailOf(chain(echo(0.25, 0, 1), echo(0.5, 0, 1)))).toBe(0.75);
    const mixed: FxChain = {
      mix: 0.5,
      a: chain(echo(1, 0, 1)),
      b: chain(echo(0.25, 0, 1)),
      stages: [echo(0.5, 0, 1)],
    };
    expect(fxTailOf(mixed)).toBe(1.5);
  });

  it('is known from the plan before any value is: an echo rings, wherever it is', () => {
    const f = withParam('SoundFxDelay', 'mix', [{ key: 'wet', kind: 'number' }]);
    expect(fxRings(soundFxBuildFor(f.fx).compiled!)).toBe(true);
    const forked = { mix: { value: 0.5 }, a: EMPTY_PLAN, b: soundFxBuildFor(f.fx).compiled!, stages: [] };
    expect(fxRings(forked)).toBe(true);
  });
});

/**
 * Records what it was asked to play, with the line of effects its values make, and every tune with
 * its time on the side. A voice is numbered by how many have been played, so the first is 1. Every
 * file lasts a quarter of a second.
 */
function fakeAudio(): AudioSink & {
  played: { file: string; owner: string; fx: FxChain | undefined }[];
  tuned: { voice: number; params: Readonly<Record<string, number>> }[];
  times: (number | undefined)[];
} {
  const sink = {
    played: [] as { file: string; owner: string; fx: FxChain | undefined }[],
    tuned: [] as { voice: number; params: Readonly<Record<string, number>> }[],
    times: [] as (number | undefined)[],
    play: (file: string, _volume: number, _loop: boolean, owner: string, fx?: FxVoice) =>
      sink.played.push({ file, owner, fx: fx && fxChainOf(fx.plan, fx.params) }),
    tune: (voice: number, params: Readonly<Record<string, number>>, time?: number) => {
      sink.tuned.push({ voice, params });
      sink.times.push(time);
    },
    playNote: () => 0,
    playSequence: () => 0,
    stopSequence: () => {},
    playClip: () => 0,
    stopPlayback: () => {},
    release: () => {},
    length: () => 0.25,
    stop: () => {},
    tail: () => 0,
    stopVoice: () => {},
    stopOwner: () => {},
    setMix: () => {},
    setMixVolume: () => {},
    mixVolume: () => 1,
    resetMix: () => {},
    tuneMix: () => {},
  };
  return sink;
}

describe('Play sound with fx', () => {
  function playingScene(fxId: (f: ReturnType<typeof makeFx>) => string) {
    const scene = makeSpriteScene('Box');
    const withFx = makeFx(scene);
    const fx = withFx.fx;
    const input = withFx.edit.addNode('SoundFxInput');
    const pitch = withFx.edit.addNode('SoundFxPitch', { semitones: -12 });
    const output = withFx.edit.addNode('SoundFxOutput');
    withFx.edit.connect(input, 'out', pitch, 'in');
    withFx.edit.connect(pitch, 'out', output, 'in');
    const sound = new CreateSoundCommand('Jump', FILE);
    scene.stack.execute(sound);
    const behavior = makeBehavior(scene, 'Logic');
    place(scene, behavior.id, { x: 0, y: 0 }, place(scene, scene.spriteId, { x: 0, y: 0 }));
    const edit = graphEditor(scene, behavior);
    const start = edit.addNode('OnStart');
    const play = edit.addNode('PlaySound', { sound: sound.asset.id, fx: fxId(withFx) });
    edit.connect(start, 'exec', play, 'exec');
    return { ...scene, fx, output, pitch };
  }

  it('sends the voice through the asset the node names', () => {
    const f = playingScene((s) => s.fx.id);
    const audio = fakeAudio();
    startWorld(f, { behaviors: true, audio }).frame();
    expect(audio.played).toMatchObject([{ file: FILE, fx: { pitch: -12, stages: [] } }]);
  });

  it('plays it dry without an fx, with one that is gone, and with one that does not compile', () => {
    const none = fakeAudio();
    startWorld(
      playingScene(() => ''),
      { behaviors: true, audio: none },
    ).frame();
    const gone = fakeAudio();
    startWorld(
      playingScene(() => 'no-such-fx'),
      { behaviors: true, audio: gone },
    ).frame();
    const broken = playingScene((s) => s.fx.id);
    broken.fx.graph.edges = [];
    expect(soundFxBuildFor(broken.fx).compiled).toBeNull();
    const brokenAudio = fakeAudio();
    startWorld(broken, { behaviors: true, audio: brokenAudio }).frame();
    for (const audio of [none, gone, brokenAudio])
      expect(audio.played).toMatchObject([{ file: FILE, fx: DRY }]);
  });
});

/** Input with the given parameters, its `param` fed into the effect's `into`, then Output. */
function withParam(type: string, into: string, ports: DeclaredPort[], param = ports[0]!.key) {
  const f = line([{ type }]);
  f.input.ports = ports;
  const effect = f.fx.graph.nodes.find((n) => n.type === type)!;
  f.edit.connect(f.input, param, effect, into);
  return f;
}

describe('the parameters of a sound FX', () => {
  it('stay open in the plan and take the value handed in, held to the row', () => {
    const f = withParam('SoundFxPitch', 'semitones', [{ key: 'depth', kind: 'number', default: -12 }]);
    const plan = soundFxBuildFor(f.fx).compiled!;
    expect(pitchOf(plan)).toEqual([{ value: -12, param: 'depth', min: -64, max: 64 }]);
    expect(pitchOf(fxChainOf(plan))).toBe(-12);
    expect(pitchOf(fxChainOf(plan, { depth: 5 }))).toBe(5);
    expect(pitchOf(fxChainOf(plan, { depth: 100 }))).toBe(64);
    expect(pitchOf(fxChainOf(plan, { other: 3 }))).toBe(-12);
  });

  it('keep a stage that is 0 by default, so a value handed in can open it, even on a playing voice', () => {
    const f = withParam('SoundFxGain', 'gain', [{ key: 'loud', kind: 'number' }]);
    const plan = soundFxBuildFor(f.fx).compiled!;
    expect(plan.stages).toHaveLength(1);
    expect(fxChainOf(plan)).toEqual({ pitch: 0, shifted: false, stages: [{ kind: 'gain', gain: 1 }] });
    expect(fxChainOf(plan, { loud: 6 }).stages[0]).toMatchObject({ kind: 'gain' });
    expect((fxChainOf(plan, { loud: 6 }).stages[0] as { gain: number }).gain).toBeCloseTo(10 ** (6 / 20));
  });

  it('keep a pitch that is 0 by default on the worklet, and only a typed-in 0 off it (#317)', () => {
    const fed = withParam('SoundFxPitch', 'semitones', [{ key: 'depth', kind: 'number' }]);
    expect(fxChainOf(soundFxBuildFor(fed.fx).compiled!)).toMatchObject({ pitch: 0, shifted: true });
    const typed = line([{ type: 'SoundFxPitch', params: { semitones: 0 } }]);
    expect(fxChainOf(soundFxBuildFor(typed.fx).compiled!)).toMatchObject({ pitch: 0, shifted: false });
  });

  it('feed an EQ band as well', () => {
    const f = withParam('SoundFxEq', 'mid', [{ key: 'body', kind: 'number', default: 3 }]);
    const chain = fxChainOf(soundFxBuildFor(f.fx).compiled!, { body: -4 });
    expect(chain.stages).toEqual([{ kind: 'filter', filter: 'peaking', frequency: 1000, gain: -4, q: 1 }]);
  });

  it('are kept with their defaults through a save, a default only on a number', () => {
    const f = withParam('SoundFxPitch', 'semitones', [{ key: 'depth', kind: 'number', default: -7 }]);
    expect(roundTrip(f.project)).toEqual(f.project);
    const loaded = deserializeProject({
      name: 'P',
      assets: [
        {
          id: 'fx',
          type: 'soundfx',
          name: 'FX',
          graph: {
            nodes: [
              {
                id: 'a',
                type: 'SoundFxInput',
                x: 0,
                y: 0,
                params: {},
                ports: [
                  { key: 'p', kind: 'number', default: 'loud' },
                  { key: 'q', kind: 'number', default: 2 },
                ],
              },
            ],
            edges: [],
          },
        },
      ],
    });
    expect((loaded.assets[0] as SoundFxAsset).graph.nodes[0]!.ports).toEqual([
      { key: 'p', kind: 'number' },
      { key: 'q', kind: 'number', default: 2 },
    ]);
  });

  it('do not go where a sound goes, and a sound does not go where a number does', () => {
    const f = line([{ type: 'SoundFxGain' }]);
    f.input.ports = [{ key: 'level', kind: 'number' }];
    const gain = f.fx.graph.nodes.find((n) => n.type === 'SoundFxGain')!;
    f.fx.graph.edges.find((e) => e.to.node === gain.id)!.from.port = 'level';
    expect(compileSoundFx(f.fx.graph).problems[gain.id]).toBe('"in" takes a sound');
    expect(portsCompatible('fxparams', 'fxparams')).toBe(true);
    expect(portsCompatible('fxparams', 'any')).toBe(false);
    expect(portsCompatible('struct', 'fxparams')).toBe(false);
  });

  it('have a default set by a command that undoes', () => {
    const f = withParam('SoundFxPitch', 'semitones', [{ key: 'depth', kind: 'number' }]);
    f.stack.execute(new SetPortDefaultCommand(f.fx.id, f.input.id, 'depth', 4));
    expect(f.input.ports).toEqual([{ key: 'depth', kind: 'number', default: 4 }]);
    expect(pitchOf(fxChainOf(soundFxBuildFor(f.fx).compiled!))).toBe(4);
    f.stack.undo();
    expect(f.input.ports).toEqual([{ key: 'depth', kind: 'number' }]);
  });
});

describe('Sound FX parameters and Play sound', () => {
  function scene(options: { pick?: string[]; values?: Record<string, number>; other?: boolean } = {}) {
    const f = makeSpriteScene('Box');
    const withFx = makeFx(f);
    const { fx, edit: fxEdit } = withFx;
    const input = fxEdit.addNode('SoundFxInput');
    input.ports = [
      { key: 'depth', kind: 'number', default: -12 },
      { key: 'loud', kind: 'number', default: 0 },
    ];
    const pitch = fxEdit.addNode('SoundFxPitch');
    const gain = fxEdit.addNode('SoundFxGain');
    const output = fxEdit.addNode('SoundFxOutput');
    fxEdit.connect(input, 'out', pitch, 'in');
    fxEdit.connect(pitch, 'out', gain, 'in');
    fxEdit.connect(gain, 'out', output, 'in');
    fxEdit.connect(input, 'depth', pitch, 'semitones');
    fxEdit.connect(input, 'loud', gain, 'gain');
    const sound = new CreateSoundCommand('Jump', FILE);
    f.stack.execute(sound);
    const behavior = makeBehavior(f, 'Logic');
    place(f, behavior.id, { x: 0, y: 0 }, place(f, f.spriteId, { x: 0, y: 0 }));
    const edit = graphEditor(f, behavior);
    const start = edit.addNode('OnStart');
    const play = edit.addNode('PlaySound', { sound: sound.asset.id, fx: fx.id });
    const named = options.other ? 'another-fx' : fx.id;
    const params = edit.addNode('SoundFxParameters', { soundFxAsset: named, ...options.values });
    params.ports = (options.pick ?? []).map((key) => ({ key, kind: 'number' as const }));
    edit.connect(start, 'exec', play, 'exec');
    edit.connect(params, 'params', play, 'fxParams');
    return { ...f, fx, input, behavior, play, params };
  }

  it('hands the picked values to the voice, the others keep their defaults', () => {
    const f = scene({ pick: ['depth'], values: { depth: 7 } });
    const audio = fakeAudio();
    startWorld(f, { behaviors: true, audio }).frame();
    expect(audio.played).toMatchObject([
      { file: FILE, fx: { pitch: 7, stages: [{ kind: 'gain', gain: 1 }] } },
    ]);
  });

  it('starts a picked parameter at the default of the FX', () => {
    const f = scene({ pick: ['depth', 'loud'] });
    const def = resolveDef(f.params, f.behavior.graph, graphLookup(f.project))!;
    expect(def.inputs.map((p) => [p.key, p.default])).toEqual([
      ['depth', -12],
      ['loud', 0],
    ]);
    const audio = fakeAudio();
    startWorld(f, { behaviors: true, audio }).frame();
    expect(audio.played[0]!.fx).toEqual({ pitch: -12, shifted: true, stages: [{ kind: 'gain', gain: 1 }] });
  });

  it('says so at the node when no FX is picked or it is gone', () => {
    const f = scene();
    const lookup = graphLookup(f.project);
    expect(callProblem(f.params, lookup)).toBeNull();
    f.params.params.soundFxAsset = '';
    expect(callProblem(f.params, lookup)).toBe('No sound FX picked');
    f.params.params.soundFxAsset = 'gone';
    expect(callProblem(f.params, lookup)).toBe('That sound FX is gone');
  });

  it('warns at Play sound when the parameters are for another FX', () => {
    expect(soundFxParamsMismatch(scene().play, scene().behavior.graph)).toBeNull();
    const f = scene({ other: true });
    expect(soundFxParamsMismatch(f.play, f.behavior.graph)).toBe('The parameters are for another sound FX');
  });

  it('follow a parameter renamed at the Input, edges and value included, and back on undo', () => {
    const f = scene({ pick: ['depth'], values: { depth: 7 } });
    f.stack.execute(new RenamePortCommand(f.fx.id, f.input.id, 'depth', 'drop'));
    expect(f.params.ports).toEqual([{ key: 'drop', kind: 'number' }]);
    expect(f.params.params.drop).toBe(7);
    const audio = fakeAudio();
    startWorld(f, { behaviors: true, audio }).frame();
    expect(audio.played[0]!.fx).toEqual({ pitch: 7, shifted: true, stages: [{ kind: 'gain', gain: 1 }] });
    f.stack.undo();
    expect(f.params.ports).toEqual([{ key: 'depth', kind: 'number' }]);
    expect(f.params.params.depth).toBe(7);
  });
});

describe('Set sound FX parameters (#315)', () => {
  /**
   * Pressing x plays Jump through an FX twice, the first `sound` – then hands `depth` to the voice
   * the first play gave out, over the length of that play where `spanned`.
   */
  function tuning(sound?: string, spanned = false) {
    const f = makeSpriteScene('Box');
    const { fx } = makeFx(f);
    const created = new CreateSoundCommand('Jump', FILE);
    f.stack.execute(created);
    const behavior = makeBehavior(f, 'Logic');
    place(f, behavior.id, { x: 0, y: 0 }, place(f, f.spriteId, { x: 0, y: 0 }));
    const edit = graphEditor(f, behavior);
    const first = edit.addNode('PlaySound', { sound: sound ?? created.asset.id, fx: fx.id });
    const second = edit.addNode('PlaySound', { sound: created.asset.id, fx: fx.id });
    const set = edit.addNode('SetSoundFxParameters');
    const params = edit.addNode('SoundFxParameters', { soundFxAsset: fx.id, depth: 3 });
    params.ports = [{ key: 'depth', kind: 'number' }];
    edit.wire([
      [edit.addNode('OnKeyDown', { key: 'x' }), 'exec', first, 'exec'],
      [first, 'exec', second, 'exec'],
      [second, 'exec', set, 'exec'],
      [first, 'voice', set, 'voice'],
      [params, 'params', set, 'fxParams'],
    ]);
    if (spanned) edit.wire([[first, 'length', set, 'time']]);
    return f;
  }

  it('hands the values to the one voice its Play sound gave out, not to another of the same sound', () => {
    const audio = fakeAudio();
    const { input, frame } = startWorld(tuning(), { behaviors: true, audio });
    input.press('x');
    frame();
    expect(audio.played).toHaveLength(2);
    // Also by the scope a note's own sound FX goes by (#346), which a sound does not have.
    expect(audio.tuned).toEqual([{ voice: 1, params: { depth: 3, 'fx:depth': 3 } }]);
  });

  it('reaches nothing where its Play sound played nothing', () => {
    const audio = fakeAudio();
    const { input, frame } = startWorld(tuning('no-such-sound'), { behaviors: true, audio });
    input.press('x');
    frame();
    expect(audio.played).toHaveLength(1);
    expect(audio.tuned).toEqual([]);
  });

  it('spans a change over the length its Play sound hands out', () => {
    const audio = fakeAudio();
    const { input, frame } = startWorld(tuning(undefined, true), { behaviors: true, audio });
    input.press('x');
    frame();
    expect(audio.times).toEqual([0.25]);
  });
});