[sdiy] Digital control

[Ingo Debus]

Am Mittwoch, 23.02.05 um 14:14 Uhr schrieb Johannes Öberg:

> I'm thinking about building some simple analog FX modules, mainly a
> compressor and a filter. However, I would really like digital control
> over them; at least patch memory. What's the simplest/cheapest way of
> implementing this? I have some experience with PIC programming, so I
> guess what I need help on are some digitally controlled resistors or
> something, to replace the pots.
>

You can use a multiplying DAC as attenuator for analog signals. Karl 
Dalen suggested this recently here.

Ingo