Feat: adapt cagire to doux v0.0.12
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@@ -57,29 +57,15 @@ The `ftype` parameter sets the filter slope (rolloff steepness).
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saw 800 lpf 3 ftype . ( 48 dB/oct lowpass )
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```
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## Filter Envelope
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## Filter Envelope Modulation
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Filters can be modulated by an ADSR envelope. The envelope multiplies the base cutoff:
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```
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final_cutoff = lpf + (lpe × envelope × lpf)
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```
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When the envelope is at 1.0 and `lpe` is 1.0, the cutoff doubles. When the envelope is at 0, the cutoff equals `lpf`.
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Use the `env` word to apply a DAHDSR envelope to any filter cutoff:
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```forth
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saw 200 lpf 2 lpe 0.01 lpa 0.3 lpd . ( cutoff sweeps from 600 Hz down to 200 Hz )
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saw 200 8000 0.01 0.3 0.5 0.3 env lpf . ( cutoff sweeps from 200 to 8000 Hz )
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```
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| Parameter | Description |
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|-----------|-------------|
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| `lpe` | Envelope depth (multiplier, 1.0 = double cutoff at peak) |
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| `lpa` | Attack time in seconds |
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| `lpd` | Decay time in seconds |
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| `lps` | Sustain level (0-1) |
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| `lpr` | Release time in seconds |
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The same pattern works for highpass (`hpe`, `hpa`, etc.) and bandpass (`bpe`, `bpa`, etc.).
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The same works for highpass and bandpass: `env hpf`, `env bpf`.
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## Ladder Filters
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@@ -100,7 +86,7 @@ saw 1000 lbpf 0.8 lbpq . ( ladder bandpass )
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| `lbpf` | Hz | Ladder bandpass cutoff |
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| `lbpq` | 0-1 | Ladder bandpass resonance |
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Ladder filters share the lowpass envelope parameters (`lpe`, `lpa`, etc.).
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Ladder filter cutoffs can also be modulated with `env`, `lfo`, `slide`, etc.
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## EQ
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@@ -16,34 +16,6 @@ saw 5 vib 0.5 vibmod . ( 5 Hz, 0.5 semitone depth )
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| `vibmod` | semitones | Modulation depth |
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| `vibshape` | shape | LFO waveform (sine, tri, saw, square) |
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## Pitch Envelope
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The pitch envelope applies an ADSR to the oscillator frequency.
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```forth
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sine 100 freq 24 penv 0.001 patt 0.1 pdec .
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```
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| Parameter | Description |
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|-----------|-------------|
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| `penv` | Envelope depth in semitones |
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| `patt` | Attack time in seconds |
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| `pdec` | Decay time in seconds |
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| `psus` | Sustain level (0-1) |
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| `prel` | Release time in seconds |
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## Glide
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Glide interpolates between pitch changes over time.
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```forth
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saw c4 0.1 glide . ( 100ms glide )
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```
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| Parameter | Range | Description |
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|-----------|-------|-------------|
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| `glide` | seconds | Glide time |
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## FM Synthesis
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FM modulates the carrier frequency with a modulator oscillator.
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@@ -58,7 +30,7 @@ sine 440 freq 2 fm 2 fmh . ( modulator at 2× carrier frequency )
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| `fmh` | ratio | Harmonic ratio (modulator / carrier) |
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| `fmshape` | shape | Modulator waveform |
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FM has its own envelope (`fme`, `fma`, `fmd`, `fms`, `fmr`).
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Use `env` to apply a DAHDSR envelope to FM depth: `0 5 0.01 0.1 0.3 0.5 env fm`.
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## Amplitude Modulation
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@@ -56,37 +56,29 @@ Noise sources ignore pitch. Use filters to shape the spectrum.
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All filter and effect parameters apply to the input signal.
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## Plaits Engines
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## Additive
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The Plaits engines come from Mutable Instruments and provide a range of synthesis methods. Beware, these sources can be quite CPU hungry. All share three control parameters (`0.0`-`1.0`):
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| Name | Description |
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|------|-------------|
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| `add` | Stacks 1-32 sine partials with spectral tilt, even/odd morph, harmonic stretching, phase shaping. |
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| Parameter | Controls |
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|-----------|----------|
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| `harmonics` | Harmonic content, structure, detuning. |
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| `timbre` | Brightness, tonal color. |
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| `harmonics` | Harmonic content / structure. |
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| `timbre` | Brightness / tonal color. |
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| `morph` | Smooth transitions between variations. |
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| `partials` | Number of active harmonics (1-32). |
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### Pitched
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## Percussion
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Native drum synthesis with timbral morphing. All share `wave` (waveform: 0=sine, 0.5=tri, 1=saw), `morph`, `harmonics`, and `timbre` parameters.
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| Name | Description |
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|------|-------------|
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| `modal` | Struck/plucked resonant bodies (strings, plates, tubes). |
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| `va`, `analog` | Virtual analog with waveform sync and crossfading. |
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| `ws`, `waveshape` | Waveshaper and wavefolder. |
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| `fm2` | Two-operator FM synthesis with feedback. |
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| `grain` | Granular formant oscillator (vowel-like). |
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| `additive` | Harmonic additive synthesis. |
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| `wavetable` | Built-in Plaits wavetables (four 8x8 banks). |
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| `chord` | Four-note chord generator. |
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| `swarm` | Granular cloud of enveloped sawtooths. |
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| `pnoise` | Clocked noise through multimode filter. |
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### Percussion
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| Name | Description |
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|------|-------------|
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| `kick`, `bass` | 808-style bass drum. |
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| `snare` | Analog snare drum with tone/noise balance. |
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| `hihat`, `hat` | Metallic 808-style hi-hat. |
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Percussions are super hard to use correctly, because you need to tweak their envelope correctly.
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| `kick` | Bass drum. |
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| `snare` | Snare drum with tone/noise balance. |
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| `hat` | Hi-hat. |
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| `tom` | Tom drum. |
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| `rim` | Rimshot. |
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| `cowbell` | Cowbell. |
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| `cymbal` | Cymbal. |
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@@ -32,9 +32,6 @@ Without `scan`, the sample plays normally. With `scan`, it becomes a looping wav
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|-----------|-------|-------------|
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| `scan` | 0-1 | Position in wavetable (0 = first cycle, 1 = last) |
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| `wtlen` | samples | Cycle length in samples (0 = entire sample) |
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| `scanlfo` | Hz | LFO rate for scan modulation |
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| `scandepth` | 0-1 | LFO modulation depth |
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| `scanshape` | shape | LFO waveform |
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## Cycle Length
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@@ -57,24 +54,16 @@ pad 0.5 scan . ( blend between middle cycles )
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pad 1 scan . ( last cycle only )
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```
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## LFO Modulation
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## Scan Modulation
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Automate the scan position with a built-in LFO:
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Use audio-rate modulation words to automate the scan position:
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```forth
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pad 0 scan 2 scanlfo 0.3 scandepth . ( 2 Hz modulation, 30% depth )
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pad 0 1 2 lfo scan . ( sine LFO, full range, 2 Hz )
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pad 0 0.5 1 tlfo scan . ( triangle LFO, half range, 1 Hz )
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pad 0 1 0.5 jit scan . ( random scan every 0.5 steps )
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```
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Available LFO shapes:
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| Shape | Description |
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|-------|-------------|
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| `sine` | Smooth oscillation (default) |
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| `tri` | Triangle wave |
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| `saw` | Sawtooth, ramps up |
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| `square` | Alternates between extremes |
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| `sh` | Sample and hold, random steps |
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## Creating Wavetables
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A proper wavetable file:
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