[sdiy] Digital pots as the gain element in a filter

[karl dalen]

Well, the idea DAC as gain/time cell are as old as DAC's them selfs
look into some older 8-12bit DAC appnotes or datashets from 70-90ies
and you find plenty of e.g SVF implementations.

KD

> Hi all,
> 
> I always thought this was a whacky idea - especially since
> it would give only an approximate expo response through one of those
> "linear to pseudo-audio" pots trick - but someone ended up doing it!
> http://hackmeopen.com/wp-content/uploads/2011/05/Rockit-Schematic.png
> (From: http://www.kickstarter.com/projects/790206393/rockit-8-bit-synth-kit?ref=live)
> 
> Do you know of other designs using something like this?
> 
> Olivier