BSLN303

inherits : Chugraph : UGen : Object

This Chugraph UGen emulates the historical acid synthesizer. It uses a saw/square oscillator through a resonant low-pass filter and VCA, driven by twin envelopes (VEG for amplitude, MEG for filter cutoff) and an accent-sweep circuit (diode + ganged pot + cap). Velocity > 100 triggers accent. by Vince Shields, 2026.

examples

• bsln303-help.ck

constructors

BSLN303()

Default constructor for BSLN303.

member functions

void noteOn(int midi, int velocity)

Trigger a note; velocity > 100 sets accent.

void noteOff(int midi)

Release a held note; does not gate the envelopes.

float cutoff(float value)

Set base filter cutoff, [0.0-1.0]. Maps 80 Hz to 8 kHz exponentially.

float cutoff()

Get base filter cutoff, [0.0-1.0].

float resonance(float value)

Set filter Q, [0.0-1.0]. Also smooths the accent sweep.

float resonance()

Get filter Q, [0.0-1.0].

float envMod(float value)

Set MEG depth into filter cutoff, [0.0-1.0].

float envMod()

Get MEG depth into filter cutoff, [0.0-1.0].

float decay(float value)

Set MEG decay time on non-accented notes, [0.0-1.0]. Maps 80 ms to 2 s.

float decay()

Get MEG decay time, [0.0-1.0].

float accent(float value)

Set accent loudness and sweep intensity, [0.0-1.0].

float accent()

Get accent loudness and sweep intensity, [0.0-1.0].

int waveform(int w)

Set oscillator waveform, 0 = saw, 1 = square.

int waveform()

Get oscillator waveform.

int slide(int s)

Set slide (portamento) mode, 0 = retrigger each note, 1 = legato glide (requires note overlap).

int slide()

Get slide mode.

float pitchBend(float value)

Set pitch bend as a frequency multiplier applied after slide, 1.0 = no bend.

float pitchBend()

Get pitch bend multiplier.