The wavetable oscillator code follows the basic structure of most audio processing blocks, with three types of functions: at the start: initialization—create the oscillator and its wavetables as needed: control—change the oscillator frequency, and pulse width for PWM every sample: … Continue reading →

In Part 2, we looked at how to use subtables designed to cover one octave each, removing upper harmonics for each higher octave to avoid aliasing. Here’s a view of the nine wavetables for our sawtooth oscillator, with the starting … Continue reading →

Years ago, Cristoph Kemper told me how the Access Virus came to be. He had coded a filter on a DSP and wanted to test it. Of course he needed an oscillator, so he coded that…pretty soon he had a … Continue reading →