A frequency in centi-hertz.
A single signed 8-bit audio sample.
Our synthesiser. You can tell it to play notes, then repeatedly ask it for samples (which are calculated as you ask for them). You could either buffer those samples and dispatch the to a PC sound card, or pass them to a DAC in real-time. The samples are calculated by summing together the outputs of the four channels.
We have a three channel synthesiser.
Notes on an piano keyboard, where A4 = 440 Hz.
Our oscillator produces one of four waveforms.