shawn
adb35a730b
feat: Add analog and ping_pong delay subtypes under FXType.DELAY
...
- Refactor _apply_delay into subtype dispatcher (digital/analog/ping_pong/tape)
- Add _apply_analog_delay: BBD-style with one-pole LPF on feedback path
and subtle saturation (tanh) for warm, darker repeats. tone param
controls feedback brightness (0.0=dark, 1.0=bright).
- Wire existing _apply_ping_pong_delay and _apply_tape_echo as subtypes
- All existing delay tests (TestDelay, TestPingPongDelay) pass unchanged
- Add TestAnalogDelay: output range, dry passthrough, feedback tail decay,
tone spectral effect, state initialization, bypass
- Add TestDelaySubtypePingPong: output finite, dry path, state accumulation,
ping alternation, zero mix passthrough, bypass
Unblocks child task t_14bae7ea (FXBlock subtype field + pipeline dispatch)
2026-06-13 00:41:22 -04:00
shawn
c8d7541065
feat: full FX palette expansion — 32 new effects
...
Adds all 27 new DSP implementations plus tests and parameter schemas:
Pitch & Frequency (5): octaver, pitch_shifter, harmonizer, whammy, detune
Modulation (7): ring_modulator, auto_wah, envelope_filter, rotary_speaker,
uni_vibe, auto_pan, stereo_widener
Drive & Saturation (3): bitcrusher, wavefolder, rectifier
Dynamics (4): expander, de_esser, transient_shaper, sidechain_compressor
Filters & EQ (6): parametric_eq, high_pass_filter, low_pass_filter,
band_pass_filter, notch_filter, formant_filter
Time-Based (6): ping_pong_delay, multi_tap_delay, reverse_delay, tape_echo,
shimmer_reverb, looper
Ambience (1): early_reflections
Each effect has: DSP function (5-30 lines numpy), case dispatch entry,
parameter schema in _FX_PARAM_SCHEMAS, and tests for critical effects.
CPU-heavy effects (pitch_shifter, shimmer_reverb) tagged as BETA.
All 79 tests pass.
2026-06-08 18:04:02 -04:00
shawn
d9682f3bea
Build all FX blocks: gate, comp, boost/od/dist/fuzz, eq, mod (chorus/flanger/phaser/tremolo/vibrato), delay, reverb (Schroeder), volume
...
- 15 FX blocks implemented with per-block state isolation
- All blocks <500us per 256-sample block (reverb closest at 465us on x86)
- 57 unit tests all passing (per-effect, chain, bypass, state isolation)
- Benchmark script at scripts/benchmark_fx.py
- Vectorised delay reads via read_block_varying()
- scipy.lfilter for EQ (3-band RBJ) and reverb damping
- Fixed _DelayLine.write_block wraparound crash for large blocks
- Comb/Allpass buffers sized to BLOCK_SIZE * 2 minimum
2026-06-07 23:32:28 -04:00
shawn