Bill's Bits

[Fraser, Colin J]

> -----Original Message-----
> From: Don Tillman [mailto:don at till.com]
> Sent: 30 October 1998 16:25
> To: steveg at bss10a.staffs.ac.uk; rsowa at WizjaTV.pl;
> synth-diy at mailhost.bpa.nl
> Subject: Re: Bill's Bits
> 
> 
>    Date: Fri, 30 Oct 1998 10:01:36
>    From: Dr S Grainger <steveg at bss10a.staffs.ac.uk>
> 
>    With the wavetable ideas I'm mainly interested in the phase-
>    accumulating oscillator idea whereby the sampling replay
>    rate is constant. This is usually achieved with a pitch register/
>    adder/accumulator arrangement which is clocked at a constant
>    rate. This system can be easily multiplexed so that a polyphonic
>    generator csn be produced.
> 
> That's the easy part.  How about aliasing of the stored waveform at
> higher frequencies?
> 

The Music 500 uses fixed clock phase-accumulator oscillators, and basically
ignores the problem of aliasing.
There is some present if you listen carefully, but I didn't really notice it
until you mentioned it.

It'll probably really bug me now - thanks!

Colin f