[sdiy] DACs for Arp-style quantizer

harrybissell harrybissell at prodigy.net
Wed Feb 1 01:58:31 CET 2006


<blonde mode on>

uhhh... hello...?

Haven't you heard of the "Wiard MiniWave" ???   :^P

H^) harry  (pay no attention to the man behind the curtain :^)

Seriously... I was going to build a programmable scale
quantizer, but buying the MiniWave was quicker. Finally I DID
build a quantizer, freeing up the Minwave to be a wavetable
oscillator (as it is better suited).

The ARP design is 'ok' if you make some changes... namely
you want to add a latch between the comparator output and
clock it on the opposite edge of the D/A clock... so that
you have 1/2 clock cycle for the comparator to stabilize before
clocking the LF398

H^) harry again



Grant Richter wrote:
> 
> Of course an ADC followed by a DAC only uses 2 chips costing about $4
> now a days.
> 
> If you put an EPROM between them, you can have multiple scales.



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