[sdiy] FW: Kawai K3 - Bandlimited Waveforms

[karl dalen]

Its interesting to note that the K3 does a poor job in this
sample table per octave switching, one can very easily hear
when a table are swapped in and out.

Btw, should phase accumulator NCO's be wieved as
variable sample rate or fixed rate NCO's?

I was thinking of the aliasing on an NCO using low rate
versus one that uses a high rate (1Mhz or more). 

Reg
KD
  

--- Den sön 2010-01-17 skrev Paul Maddox <paul.Maddox.mail-list at Synth.net>:

> Från: Paul Maddox <paul.Maddox.mail-list at Synth.net>
> Ämne: Re: [sdiy] FW: Kawai K3 - Bandlimited Waveforms
> Till: "SynthDIY" <synth-diy at dropmix.xs4all.nl>
> Datum: söndag 17 januari 2010 21.38
> 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
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> Synth-diy at dropmix.xs4all.nl
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> 


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