High up the Flanger's comb flickered and looked pixelated. Each column
of its screen took six readings, and its teeth pass there faster than
frames are drawn, up to 0.4 of a tooth a frame at 15 kHz by default.
Each frame caught other teeth, and each column was drawn as a sharp
rectangle.
- flangerColumns reckons each column exactly. The response only hangs
on the phase, and between two multiples of pi it runs one way. So a
column holds its lowest and highest at its ends or on the peaks and
notches inside it.
- Each frame is blurred over the delays of the last 1/20 s
(RESPONSE_BLUR), about what an eye blends. Where teeth pass faster
than that, they become a calm band from the deepest notch to the
highest peak. Further down, where they can be followed, they stay
sharp and move.
- The response is drawn as a band between two smooth lines through
the columns, no longer as one rectangle per column.
- responseColumnsOf picks the Phaser's readings or the Flanger's exact
columns. responseDb had no caller left and is gone.
Measured before choosing the blur, as the mean change of a column from
one frame to the next on the default Flanger (2-5 / 5-10 / 10-20 kHz):
readings as before 5.6 / 10.6 / 14.3 dB
exact, no blur 5.5 / 10.2 / 12.9 dB
exact, 1/60 s 5.0 / 7.6 / 4.0 dB
exact, 1/20 s 3.9 / 2.6 / 0.04 dB
Under 5 kHz most of what is left is the teeth really moving.
Tests:
Unit modulation-view (stein2): 24 tests, 2 new. The exact columns
hold what 4000 readings a column find there, and a fast swing
leaves the same band over 16 kHz in three frames in a row.
Counter-check: without the peaks and notches inside a column, both
new tests fail.
e2e 34 (atx): ALL PASSED, 142 checks.
Gate (atx): CHECK EXIT 0, 291 files, 4469 tests.
Pictures of the default Flanger and of one sweeping to 20 ms, near
and far, two of each 40 ms apart: smooth edges, the band the same.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The four effects that swing were still drawn as rows of numbers. Like
the Delay, the Saturation and the Limiter, each node now shows a device
of a fixed size. Its screen draws what it does over the first seconds
of a sound, and a light plays that in real time, over and over.
- One device for all four (ModulationPanel, ModulationFace and
modulationView), as KnobPanel is for Gain, Pitch, Mix and Pan. A short
description gives each its title, plate, buttons and knobs.
- Tremolo, 640x280 in cream: a wave its volume shapes, the volume as
its outline. It says DOWN TO 50%, EVERY 200 ms and DIPS -6 dB.
- Vibrato, 640x280 in plum: the pitch in semitones, cool below and warm
above. Under a wet below 1 the dry pitch stands beside it. It says
how late the voice is (LATE 0.93 ms).
- Phaser, 760x280 in mustard, and Flanger, 680x280 in steel blue: the
response from 20 Hz to 20 kHz, and under it a lane of the turn or the
delay over time. The response is drawn where the light is, so the
notches swirl and the comb jets. A comb finer than a column fills it.
- The light loops over 1, 2, 4 or 8 s, two LFO swings at least, for a
Flanger as long as its sweep takes to reach 20 ms. The face only
keeps the editor drawing while something swings and is heard.
- A Rate lamp beside each name goes from dark to lit with the swing.
- Nothing is listened to. The pictures use the worklets' own numbers:
lfoAt, vibratoSpeedUp (now exported from lfo.ts), the allpass chain
with its feedback, and the comb, reckoned at 48 kHz.
- Phaser and Flanger take 4 preset columns. Phased Pad was looked at
in a picture, nothing overlaps.
- Exported from nodes.ts: LFO_SHAPE, lfoShapeOf, TREMOLO_ROWS,
VIBRATO_ROWS, PHASER_STAGE_ROW and phaserStagesOf. FLANGER_MAX_MS is
exported from phaser.ts.
Decided here, as the request left the look open:
- A notch counts where the response falls below -3 dB, not some dB
under the loudest point. Feedback rings peaks far above 0 dB, and the
first rule counted 7 notches on a Phaser of 12 stages.
- Rate and Depth of Tremolo and Vibrato are big knobs, Wet is small.
Tests:
Unit modulation-view (stein2): 22 tests, new. Phaser and Flanger
give the dB of their worklets on a sine within 0.005 dB, the
Tremolo its samples, the Vibrato the pitch it reads at.
Counter-check: with the sign of the Phaser's feedback flipped in one
place, exactly the worklet test fails.
e2e 34 (atx): ALL PASSED, 142 checks, 4 new. Each device has its
size, its ports outside, a light that runs by itself, and a button
and a knob as one undo step each. Picking 8 stages on the Phaser
draws 4 notches.
Gate (atx): CHECK EXIT 0, 291 files, 4467 tests.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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