The VCF in LWM Rack for Pure Data
In this, the third episode of Learning Synthesis with Pure Data Series 02, we will take a look at the VCF module for the virtual modular synthesis system LWM Rack being developed for Pure Data. This is an oscillating filter module that allows one to apply both low pass and band pass filtering to one’s signal chain. These two filters can be used simultaneous and can be modulated by the built-in multi-waveform oscillator in the module.
this module has a patch bay that allows for one to input various parameters, such as cut off/center frequency, Q/resonance, oscillator rate, oscillator amplitude, oscillator waveform, pulse width modulation, and noise focus for the noise generator. This make shte filter rather dynamic.
If you have not learned about LWM Rack yet, please start with the first episode of Learning Synthesis with Pure Data Series 02. If you have not used PD yet, please start with the first series of Learning Synthesis with Pure Data.
Lesson 03 – The Oscillating VCF Module
In this lesson, we will take a look at the filter module that thus far has been made for LWM Rack being developed in Pure Data. This filter module allows one to have both a low pass filter and band pass filter simultaneously or one at a time. The filter has cut of or center frequency and resonance settings. Additionally, the filter has an oscillator that can be used to oscillate the cutoff/center frequency. The oscillator has multiple wave shapes and the frequency range of an LFO. One can alter pulse width and also focus the noise generator that is part of the oscillator.