[sdiy] PIC-based Digital Oscillator question

[Ian Smith]

> Hi Ian,
> 
> Have a look at the VCLFO code on my website:
> 
> http://www.electricdruid.net/index.php?page=projects.lfo9
> 
> It's a phase accumulator based oscillator, in this case at low frequencies not audio, but the principles the same.
> There's a quirk in that I implemented simple phase distortion ("waveform distortion") so it uses different frequency increments for the first half of the waveform and the second half, but you can ignore that.
> 
> HTH,
> Tom

Let me see if I am understanding this correctly: For the phase accumulator and the frequency increment, every time you overflow the phase accumulator, the frequency increment is incremented by one and the top how-many-ever bits of the frequency increment are used to look up a value from the waveform table. So the faster you increment through the phase accumulator, the higher the frequency of the output.
-Ian