101b12504ebc8a01cfbb4edc1fc2dfa0ec2b2bd1
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Commits
| Author | SHA1 | Message | Date | |
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  adminandClaude Opus 5.5
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01fd6e6464 |
Swirl and comb a sound with a Phaser and a Flanger node (#341)
sfxr's "phaser" is a comb filter, the sound plus a copy delayed by up to 2.9 ms. That is a flanger, not the phaser a guitarist knows. Both effects come in as nodes of their own, so each name fits its sound and sfxr is covered in full. Both run on the FX worklet like the Bitcrusher, because a feedback loop in Web Audio costs a render quantum per round. - Phaser: first-order allpasses (Stages 2, 4, 6, 8, 12) around Frequency, moved by a sine LFO Depth octaves wide at Rate Hz, with Feedback and Mix. An Envelope can move Frequency and Mix. - Flanger: a delay line of Offset ms. Sweep moves it on in ms/s from the start of the voice, an LFO adds up to Depth ms. As in sfxr the delay is mirrored at 0, and it never goes past 20 ms. Feedback comes back exactly one delay later. An Envelope can move Offset and Mix. - Mix 0 leaves the sound as it is, 1 is half sound and half copy. The notches are deepest there and the peaks stay at the sound's level. sfxr adds both at full, so its sound comes out 6 dB louder. - The Flanger's processor gets the start of its voice and begins the sweep on that sample. stageNodes takes it as a new argument `at`. - Explosion gets a Flanger in one draw out of two, with sfxr's offset and sweep and no LFO. Offset is offset^2 * 2.89 ms, Sweep is ramp^2 * 125 ms/s, signed so the direction holds. - Randomize draws a Flanger's offset and sweep like sfxr. Its LFO and feedback and all of a Phaser are drawn within bounds of their own. Mix and Stages stay, as a Bitcrusher's Mix does. Mutate moves them too, and a 0 stays 0. - New instrument preset Phased Pad: saw, Envelope, low-pass, Phaser of six stages. The other 14 are unchanged. - The Bitcrusher's worklet setup is now shared with both nodes (workletNodes), its behaviour is unchanged. Tests: - Unit phaser (new): 8 green. Counter-check with clamping at 0 instead of mirroring and a flipped allpass coefficient: 3 red. - Unit soundfx, sound-library, chip-presets: 45 / 76 / 14 green. Counter-checks: start time not passed on, phaser frequency eased linearly, sweep sign dropped, Phaser left out of Mutate, each red. - Unit core, viewport, graph: 179 files, 2979 tests green. - e2e 34 (melektaus-atx): ALL PASSED, 70 checks (1 new), first run. Chrome offline: 1 kHz notch RMS 0.0000 with two stages, 0.5657 with four. Flanger echo after 48 samples, swept echo at 533/534. About 47 Phasers (12 stages) or 63 Flangers fill the audio thread. - Gate (melektaus-atx): CHECK EXIT 0, 257 files, 3991 tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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a2d0a02645 |
Play tunes on 14 instrument presets next to the sfxr sounds (#329)
The Preset menu only had sfxr's effects: each a fixed pitch on every key that dies away by itself. Now its top half holds instruments to play melodies, basses and drums on. - Instruments: Square Lead, Pulse Lead, Echo Lead, Octave Arp, Synth Brass, Detuned Saws, String Pad, Organ, Flute, Bell, Pluck, Triangle Bass, Pluck Bass and Drum Kit. A line in the menu parts them from the seven effects below. - Their Chips follow the note, and all but Bell, Pluck and the drums hold it while the key is held. - They come out the same every time they are picked. Randomize and Mutate make a variant, as before. - They use what the graph already has: two Chips through a Mix for Detuned Saws, String Pad, Organ, Flute and Bell, an Envelope on a Filter's cutoff for Brass, Pluck and Pluck Bass, a Pitch for the detune and the octave, a Delay for Echo Lead and Bell. - Drum Kit uses single notes 36 to 46: kick, snare, closed and open hat on their General MIDI keys, each ending by itself. - A small Sketch helper lays the nodes on a grid. The sfxr presets use it too and come out as before. - Numbers keep to the steps of their rows. Pulse Lead's duty is 0.13, not 0.125, because the field rounds to 0.01. Tests: - Unit chip-presets: 12 green (5 new). Every instrument compiles without a problem, doubles its frequency an octave up, holds unless struck and is the same on every pick. The drum kit sounds on exactly 36, 38, 42 and 46. Countercheck with Follow note forced off: red. - e2e 34 (CI image on stein2, melektaus-atx was off): ALL PASSED, 65 checks (1 new). A first run had the scheduler's looped-bar check red by 10 ticks between two clock reads, which the presets do not touch; the second run was green. - Gate (stein2): CHECK EXIT 0, 256 files, 3974 tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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adminandClaude Opus 5.5
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f3ae19431a |
Make an 8-bit sound with a Preset, Randomize or Mutate (#329)
A Chip could play a sound, but finding a good one meant typing a dozen numbers. sfxr's buttons do that in one click: a kind of sound drawn anew every time, a wild draw, or a small nudge. The Instrument tab now has the same, and plays the result at once. - Preset menu with Pickup, Laser, Explosion, Powerup, Hit, Jump and Blip. It puts a new graph in place of the instrument's, as one undo step: Notes for all 128 notes, Chip, Envelope, Filter, Bitcrusher, Output. The Chip keeps its own frequency with follow note off, so every key plays the same effect, and sustain 0 ends it by itself. - The presets are sfxr's generators, worked out into Hz, semitones and seconds with sfxr's own formulas, in chipPresets.ts. sfxr's envelope holds and falls in a line, ours falls quick at first. So the decay is three times sfxr's hold and fall. - Randomize draws every number of the Chips, Envelopes, Filters and Bitcrushers anew, as sfxr's randomizer does. Waves, filter types, the Bitcrusher's mix and an Envelope's from and to stay. - Mutate moves each of those numbers a little, one in two. A 0 stays 0, so nothing that was off comes on. - An input fed by an edge is left alone by both. Both are grey while the graph has none of those nodes. - Audition, off by default as in the Pattern tab, plays the note last played again 150 ms after a change to the graph rests. - Preset, Randomize and Mutate always play that note, for up to 2 s. - ReplaceGraphCommand swaps nodes and edges and keeps groups and notes. - The info on the right of the header kept 220 px and was cut off with the four new buttons. 140 px still fit "No sound picked". Not done: punch, filter sweeps and the phaser of sfxr (#341). Tests: - Unit chip-presets (new) 7. Counter-check: a wrong Hz formula and fed inputs not left alone turn 3 of them red. Unit tests of the instrument tab, graph commands and sound FX nodes: 49 files, 851 green. - e2e 34 (melektaus-atx): ALL PASSED, 64 checks (4 new): Preset, Randomize and Mutate, Audition, three undos back to the Sample. - Screenshot with a Laser preset: the header fits at 1280 px, the chain is fitted, the Chip is a saw with its duty grey. - Gate (melektaus-atx): CHECK EXIT 0, 256 files, 3969 tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |