DSP Scripts¶

115 ready-made JavaScript DSP scripts for openDAW's scriptable devices.

Werkstatt (Audio Effects) — 115 scripts¶

Dynamics (13)¶

Script	Description
`werkstatt_compressor.js`	Compressor
`werkstatt_lookahead.js`	Lookahead Compressor
`werkstatt_limiter.js`	Brickwall Limiter
`werkstatt_maximizer.js`	Loudness Maximizer (lookahead limiting, ISP detection, TPDF dither, ceiling, stereo link)
`werkstatt_cabinet_sim.js`	Guitar Cabinet Speaker Simulator (4x12/open-back/tweed, resonance peak, speaker rolloff, cone soft clip)
`werkstatt_valve_preamp.js`	Valve/Tube Preamp (12AX7 triode, asymmetric waveshaper, even-order harmonics, Miller capacitance, output transformer)
`werkstatt_synthetic_ir_reverb.js`	Synthetic IR Reverb (algorithmic impulse response generation, exponential decay × filtered noise, early reflections, truncated convolution)
`werkstatt_sidechain_comp.js`	Sidechain Compressor (pump effect, envelope follower, gain smoothing, kick→bass ducking, 8 params)
`werkstatt_ott.js`	OTT Multiband Compressor (Xfer-style 3-band upward/downward, LR crossover 200/2000Hz, depth/time/per-band+master gain)
`werkstatt_soft_clipper.js`	Soft Clipper (tanh+cubic curves, ceiling/drive/curve, drum bus/mix bus/808 loudness without harshness)
`werkstatt_plate_reverb.js`	Plate Reverb (EMT 140 / Valhalla style: 4 allpass diffusers → FDN, damping lowpass, LFO shimmer, stereo width, pre-delay)
`werkstatt_ensemble.js`	Ensemble Chorus (Roland Juno-60 style: 3 detuned delay lines at prime-ratio LFO rates, L/C/R panning, lush ensemble wash)
`werkstatt_cassette_sim.js`	Cassette Tape Simulator (RC-20/SketchCassette style: wow 0.5-2Hz + flutter 13-33Hz pitch modulation via delay-line interpolation, asymmetric tape saturation, 80Hz head bump, HF loss from head gap, tape hiss, DC blocker, age control)
`werkstatt_analog_delay.js`	Analog BBD Delay (bucket-brigade device: clock-rate reduction for BBD aliasing, analog reconstruction filter, tanh saturation warmth, LFO modulation, tone control, stereo offset, 10-1000ms delay range)
`werkstatt_distortion_pedal.js`	Distortion Pedal (DS-1/Rat style: pre-distortion highpass, hard clipping with soft knee, active tone stack with bass/mid/treble bands, character control: mid scoop DS-1 vs mid hump Rat, level control, DC blocker)
`werkstatt_tank_reverb.js`	Tank Reverb (Accutronics Type 9 spring tank: 4 dispersive delay lines, allpass dispersion for metallic character, damping lowpass, drive saturation into tank, stereo spread, predelay, DC blocker)
`werkstatt_bx_saturator.js`	BX Saturator (3-band crossover with independent saturation: tube-style 2nd harmonic on lows, tape-style 3rd harmonic on mids, transformer-style odd harmonics on highs, blend control, output trim)
`werkstatt_nyquist_comp.js`	Nyquist Comp (parallel/New York compression: dry + heavily compressed path blended, peak envelope detector, adjustable threshold/ratio/attack/release, makeup gain on compressed path, DC blocker)
`werkstatt_thermal_comp.js`	Thermal Comp (optical compressor LA-2A style: photoresistor gain reduction with slow program-dependent attack/release, tube saturation on output, input gain drives threshold, peak reduce control, speed control)
`werkstatt_fet_comp.js`	FET Comp (Urei 1176 style: FET gain reduction with lightning-fast 0.02-4ms attack, program-dependent release, 4 ratio modes 4:1/8:1/12:1/20:1, soft knee, output transformer saturation)
`werkstatt_psycho_bass.js`	Psycho Bass (MaxxBass/RBass style: psychoacoustic bass enhancer, generates harmonics of sub-bass via polynomial nonlinearity, ear reconstructs missing fundamental, crossover 60-300Hz, 2-5 harmonics, makes bass audible on small speakers)
`werkstatt_ssl_bus_comp.js`	SSL Bus Comp (SSL G-series bus compressor: VCA-based, RMS detection, stepped ratio 2:1/4:1/10:1, stepped attack 0.1-30ms, auto-release mode, makeup gain, the "glue" compressor for mix bus)
`werkstatt_true_peak_limiter.js`	True Peak Limiter (inter-sample peak detection via 4x oversampling, lookahead delay line, fast attack, adjustable release, hard clip safety, -1 dBTP ceiling for streaming compliance — Spotify/Apple/YouTube)
`werkstatt_aire.js`	Aire (Stereo air exciter: M/S widener + HF harmonic exciter, adds brightness and width to dull/narrow mixes, 2-12kHz crossover, 2nd/3rd harmonic mix)
`werkstatt_lufs_meter.js`	LUFS Meter (ITU-R BS.1770-4: K-weighting filter + RMS + gating, integrated/short-term/momentary LUFS, true peak tracking, read-only meter — no audio modification)
`werkstatt_correlation_meter.js`	Correlation Meter (Stereo phase: correlation coefficient -1 to +1, width estimate, mono compatibility score, L/R balance, peak negative correlation tracking, read-only meter)
`werkstatt_spectrum_analyzer.js`	Spectrum Analyzer (FFT: peak frequency, spectral centroid, spectral rolloff 85%, low/mid/high band levels, crest factor, Hann window, read-only meter)
`werkstatt_exciter.js`	Harmonic Exciter
`werkstatt_deesser.js`	De-Esser
`werkstatt_transient.js`	Transient Shaper
`werkstatt_noisegate.js`	Noise Gate
`werkstatt_multiband_comp.js`	Multiband Compressor
`werkstatt_bass_enhancer.js`	Bass Enhancer (Psychoacoustic)
`werkstatt_expander.js`	Downward Expander
`werkstatt_envelope_follower.js`	Envelope Follower (amplitude tracking)
`werkstatt_glue_comp.js`	SSL-Style Glue Compressor (auto-makeup, VCA warmth, parallel mix, true stereo peak detect)
`werkstatt_de_plosive.js`	De-Plosive (adaptive highpass for vocal plosive removal, envelope follower + threshold)

Saturation/Distortion (8)¶

Script	Description
`werkstatt_darksat.js`	Dark Saturation
`werkstatt_overdrive.js`	Overdrive
`werkstatt_coldfold.js`	Cold Fold Distortion
`werkstatt_bitcrusher.js`	Bitcrusher
`werkstatt_tube_saturator.js`	Tube Saturator
`werkstatt_waveshaper.js`	Waveshaper
`werkstatt_fuzz.js`	Fuzz (Big Muff Pi / Fuzz Face style)
`werkstatt_multiband_saturator.js`	Multiband Saturator

EQ (5)¶

Script	Description
`werkstatt_paraeq.js`	Parametric EQ
`werkstatt_graphic_eq.js`	Graphic EQ
`werkstatt_dynamic_eq.js`	Dynamic EQ
`werkstatt_tilt_eq.js`	Tilt EQ
`werkstatt_matching_eq.js`	Matching EQ (Spectral Balance Corrector)

Filter (10)¶

Script	Description
`werkstatt_multifilter.js`	Multi-Mode Filter
`werkstatt_allpass.js`	Allpass Filter
`werkstatt_dcremover.js`	DC Remover + Stereo Tool
`werkstatt_comb_filter.js`	Comb Filter
`werkstatt_formant_filter.js`	Formant Filter
`werkstatt_moog_ladder.js`	Moog Ladder Filter
`werkstatt_autowah.js`	Autowah
`werkstatt_auto_wah.js`	Auto-Wah (envelope-driven biquad sweep, Mu-Tron III)
`werkstatt_svf.js`	State Variable Filter (Chamberlin)
`werkstatt_vowel_morph.js`	Vowel Morph (3 cascaded formant biquads, A→E→I→O→U interpolation, auto-morph LFO, spectral tilt)

Modulation (9)¶

Script	Description
`werkstatt_chorus.js`	Stereo Chorus
`werkstatt_flanger.js`	Stereo Flanger
`werkstatt_phaser.js`	Phaser
`werkstatt_tremolo.js`	Tremolo
`werkstatt_vibrato.js`	Pitch Vibrato
`werkstatt_rotary_speaker.js`	Rotary Speaker (Leslie)
`werkstatt_dimension_chorus.js`	Dimension Chorus
`werkstatt_harmonic_tremolo.js`	Harmonic Tremolo (Fender)

Reverb (5)¶

Script	Description
`werkstatt_reverb.js`	Plate Reverb
`werkstatt_shimmer.js`	Shimmer Delay
`werkstatt_spring_reverb.js`	Spring Reverb
`werkstatt_convolution_reverb.js`	Convolution Reverb
`werkstatt_gated_reverb.js`	Gated Reverb (80s Drum)

Delay (5)¶

Script	Description
`werkstatt_stereo_delay.js`	Stereo Delay
`werkstatt_tape_delay.js`	Tape Delay
`werkstatt_multitap_delay.js`	Multitap Delay
`werkstatt_reverse_delay.js`	Reverse Delay
`werkstatt_grain_delay.js`	Grain Delay

Pitch (5)¶

Script	Description
`werkstatt_pitch_shift.js`	Pitch Shifter
`werkstatt_ringmod_env.js`	Ring Modulator (Envelope-Followed)
`werkstatt_harmonizer.js`	Harmonizer
`werkstatt_octaver.js`	Octaver (Sub-Octave Generator)
`werkstatt_freq_shifter.js`	Frequency Shifter (SSB)

Time (4)¶

Script	Description
`werkstatt_granular_stretch.js`	Granular Time-Stretch
`werkstatt_paulstretch.js`	PaulStretch (Extreme Ambient Stretch)
`werkstatt_tape_stop.js`	Tape Stop

Stereo/Spatial (6)¶

Script	Description
`werkstatt_stereowidth.js`	Stereo Width (M/S)
`werkstatt_auto_pan.js`	Auto-Pan
`werkstatt_multiband_imager.js`	Multiband Stereo Imager
`werkstatt_binaural.js`	Binaural Spatial Panner (HRTF)
`werkstatt_mid_side_processor.js`	Mid/Side Processor (independent M/S gain + filters + width, mastering)
`werkstatt_haas_widener.js`	Haas Stereo Widener (short delay 1-30ms on one channel, precedence effect)

Spectral/FX (10)¶

Script	Description
`werkstatt_spectral_freezer.js`	Spectral Freeze (Sustain a spectral frame)
`werkstatt_reverse.js`	Reverse
`werkstatt_scratch.js`	Scratch
`werkstatt_looper.js`	Looper
`werkstatt_spectral_gate.js`	Spectral Gate
`werkstatt_vinyl.js`	Vinyl Simulator
`werkstatt_spectral_compressor.js`	Spectral Compressor (STFT)
`werkstatt_spectral_denoise.js`	Spectral Denoiser (Noise Floor Subtraction)
`werkstatt_spectral_blur.js`	Spectral Blur (STFT-based spectral smearing, freq+temporal blur, phase randomization, ambient textures)
`werkstatt_spectral_enhancer.js`	Spectral Enhancer (STFT-based high-freq air boost, spectral peak emphasis, transient enhancement, stereo widening on enhanced band)

Restoration (5)¶

Script	Description
`werkstatt_spectral_denoise.js`	Spectral Denoiser (Berouti spectral subtraction, noise floor learning, oversubtraction, musical noise prevention)
`werkstatt_dereverb.js`	De-Reverb (reverb tail suppression: per-band dual envelope followers, fast=direct/slow=tail, transient detection via ratio, tail dominance gain reduction -24 dB, decay estimation, RX De-reverb style)
`werkstatt_declicker.js`	De-Clicker (click & crackle removal: median filter, adaptive threshold, cubic Hermite interpolation, RX De-click style)
`werkstatt_decrackle.js`	De-Crackle (continuous crackle removal: adaptive crackle modeling, crackle/signal energy tracking, crackle rate estimation, RX De-crackle style)
`werkstatt_de_plosive.js`	De-Plosive (adaptive highpass for vocal plosive removal, one-pole LP envelope follower + threshold, transient-triggered HPF sweep)

Physical Modeling (3)¶

Script	Description
`werkstatt_modal_resonator.js`	Modal Resonator (marimba/bell/plate/string/wine glass)
`werkstatt_karplus_strong.js`	Karplus-Strong String (delay-line + one-pole lowpass feedback, brightness/damping/stretch controls)
`werkstatt_waveguide_string.js`	Waveguide String (bidirectional delay lines, bridge lowpass + nut allpass, pick position, inharmonicity)

Vocoder (1)¶

Script	Description
`werkstatt_vocoder.js`	Vocoder

Phase Vocoder / Pitch-Shifting (2)¶

Script	Description
`werkstatt_phase_vocoder.js`	Phase Vocoder (FFT Pitch Shifter — Élastique/Melodyne quality)
`werkstatt_time_stretch.js`	Phase Vocoder Time Stretch (preserves pitch, transient detection)

Utility (4)¶

Script	Description
`werkstatt_adsr_trim.js`	ADSR Envelope Trim
`werkstatt_envfollower.js`	Envelope Follower (with sidechain ducking)
`werkstatt_auto_tune.js`	Auto-Tune (Pitch Correction — Cher/T-Pain style)

Vocal (2)¶

Script	Description
`werkstatt_auto_tune.js`	Auto-Tune (autocorrelation pitch detection + snap-to-scale + time-domain pitch shift)
`werkstatt_formant_shifter.js`	Formant Shifter (LPC Levinson-Durbin, lattice filter, formant frequency scaling independent of pitch, gender/age/size morphing)

Apparat (Instruments) — 9 scripts¶

Script	Description
`apparat_darkbass.js`	Dark Bass (waveform, cutoff, resonance, envelope)
`apparat_coldlead.js`	Cold Lead (subtractive synth)
`apparat_subcrusher.js`	SubCrusher Bass (distorted sub bass)
`apparat_pluck.js`	Plucked String (Karplus-Strong)
`apparat_fm.js`	FM Synth (2-operator)
`apparat_ringmod.js`	Ring Modulator Synth
`apparat_wavetable.js`	Wavetable Synth (8 tables, scan + LFO, unison)
`apparat_supersaw.js`	Supersaw (7 detuned saws, JP-8000 style)
`apparat_bowed_string.js`	Bowed String (waveguide + Stribeck bow friction)

Spielwerk (MIDI Effects) — 10 scripts¶

Script	Description
`spielwerk_arpeggiator.js`	Arpeggiator (rate, octave, pattern)
`spielwerk_chordmemory.js`	Chord Memory (hold chords)
`spielwerk_mididelay.js`	MIDI Delay (echo MIDI notes)
`spielwerk_powerchord.js`	Power Chord (root + fifth)
`spielwerk_strum.js`	Strummer (simulate guitar strumming)
`spielwerk_velocity.js`	Velocity Scaler (adjust note velocities)
`spielwerk_scale_quantizer.js`	Scale Quantizer (14 scales, 12 roots, snap direction)
`spielwerk_harmonizer.js`	MIDI Harmonizer (3 voices, 14 scales)
`spielwerk_prob_gate.js`	Probability Gate (subtractive MIDI — random note removal)
`spielwerk_chorder.js`	Chorder (13 chord types, 5 voicing modes, 4 inversions, strum delay)

Using DSP scripts¶

# Load a DSP script into a Werkstatt device
import json
code = open("scripts/werkstatt_compressor.js").read()
await mcp.call("set_script_device_code", {
    "device_type": "werkstatt",
    "unit_index": 0,
    "device_index": 0,
    "code": code
})

# Set a parameter
await mcp.call("set_script_param", {
    "device_type": "werkstatt",
    "unit_index": 0,
    "device_index": 0,
    "param_label": "threshold",
    "value": 0.5
})

DSP scripts use the Werkstatt/Apparat/Spielwerk processor API:

// @werkstatt my_effect 1 1
// @param gain 0.5 0 1 linear

class Processor {
  p = {gain: 0.5}
  sr = sampleRate

  paramChanged(name, value) {
    this.p[name] = value
  }

  processAudio(inputs, outputs) {
    const input = inputs[0]
    const output = outputs[0]
    for (let ch = 0; ch < output.length; ch++) {
      const inCh = input[ch] || input[0]
      const outCh = output[ch]
      for (let i = 0; i < outCh.length; i++) {
        outCh[i] = inCh[i] * this.p.gain
      }
    }
  }

  reset() {
    // Clear state
  }
}