Virtual Analog Filter

import { VirtualAnalogFilter, PolyblepOscillator, AdsrAmp } from "synthlet";
 
const osc = PolyblepOscillator(audioContext, {
  frequency: 440,
});
const filter = VirtualAnalogFilter(audioContext, {
  type: VirtualAnalogFilter.MOOG_LADDER,
  frequency: 2000,
});
const vca = AdsrAmp(audioContext);
osc.connect(filter).connect(vca).connect(audioContext.destination);
 
vca.trigger.value = 1;

Parameters

• type: The filter type [0-8]. See below.
• frequency: The filter base cutoff frequency in Hz.
• detune: The filter frequency detune in semitones [-127,127]. Good for modulation.
• resonance: The normalized filter resonance [0,1]. 1 means self oscillation.

Valid types are:

• VirtualAnalogFilter.MOOG_LADDER
• VirtualAnalogFilter.MOOG_HALF_LADDER
• VirtualAnalogFilter.KORG35_LPF
• VirtualAnalogFilter.KORG35_HPF
• VirtualAnalogFilter.DIODE_LADDER
• VirtualAnalogFilter.OBERHEIM_LPF
• VirtualAnalogFilter.OBERHEIM_HPF
• VirtualAnalogFilter.OBERHEIM_BPF
• VirtualAnalogFilter.OBERHEIM_BSF