[sdiy] FW: Kawai K3 - Bandlimited Waveforms

[Paul Maddox]

Tom,

> Yes, sorry if I made it sound like the two techniques are completely
> different. As you say, they're not.

it's ok, I wasn't entirely sure when you said "long sample with
dropped samples to change pitch".

> There's more on the NCO techniques that both are based on, and the PPG and
> DW oscillators on my webpage.
>
> http://www.electricdruid.com/index.php?page=info.wavetableoscs

FWIW, the PPG was far cleverer than the Monowave, the architecture you
have there is for the Monowave.
The PPG used 4x4 scratchpad Rams (78s189) and performed the addition
for the phase accumulation and wave look up one at a time for each of
the 16 oscillators.
It's very very elegant solution to a problem that would otherwise have
take a lot of PCB space and power.

Paul