Bill's Bits

[Bjarne Nillson]

>Just this week, I picked up a Music 500 synthesiser (thanks Chris !). 
It's a
>digital synth add on for the BBC micro.
>It has 16 phase accumulator oscillators with 24 bit phase and frequency
>registers.
>Each oscillator output selects a sample from a wavteable held in RAM.
>Frequency resolution is 0.0056 Hz (IIRC - maybe +/- a zero) with a 
constant
>resolution over the whole range - a big plus over divide down 
oscillators.
>
>It's a very neat design - I have a magazine article from ETI (Dec 1987) 
that
>describes how it works.
>It's described as a fixed-program, pipelined DSP, implemented mainly in
>discrete 7400 series logic.

Interesting, do you have the article scanned? prhaps!

BJ


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