Raspberry Pi

[Tony Hardie-Bick]

On 13/01/12 07:23, Paul Maddox wrote:
> I think my biggest problem is that it's "fixed rate" sampling, with VHDL I
> can make things variable rate which makes things easier in my head :)

There's a fundamental reason why this might be a good approach for your work: if
you're using wavetable synthesis, aliasing (aka "it sounds digital") is much
more difficult to avoid (ie, when high harmonics are present at high amplitudes
in the wavetable). A lot of folks in the DIY community really don't care about
this kind of distortion, saying it's just another aspect of sound - YMMV - but
FWIW, there really is a fundamental reason for you to pursue variable rate
sampling if you want to use wavetable oscillators. Unless, that is, you really 
are hungry for some difficult mathematics, or you really like lo fi digital 
sounds (and yeah that can be good, if that's what you're after).

I'm wondering about how you get the full pitch range from a D->A, but, I'll 
leave that up to you to sort out ;) Basically, if the distortion is harmonically 
related to the signal, then the colouration is much more musical.

Tony (HB)