[sdiy] How to make wavetables? What size?

[Oakley Sound]

> With a 256-frame wavetable, the spectral content is limited to
128 harmonics. At a fundamental frequency of 50 Hz (the low G on
a bass), the spectrum stops at 6.4 kHz.

I don't think this is true.

Nyquist and all that does say that the uppermost frequency in any sampled 
waveform should be limited in such way, but there is no such limit here. 
What you will hear is the aliasing in all its glory. Harmonically 
related, these 'wrap around' frequencies are very much audible and are 
what gives this sort of synthesis a very distinctive sound.

The same goes with Walsh Generators... but in that case one normally 
wants to filter the extraneous stuff over half the clocking frequency.

Tony