We were looking for the lowest possible cost in our design, but I agree tha=
t using a VCA is actually a better solution.  We had a number of issues tha=
t we worked thru to get the final design, and this was our other solution t=
o use something like that.

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of=
 Harold Hallikainen
Sent: Friday, November 02, 2012 8:57 AM
To: Microcontroller discussion list - Public.
Subject: RE: [EE] DC controlled volume control

I've generally used "digipots" controlled by SPI or I2C or increment/decrem=
ent controls. But, to control directly from a pot, I'd use a voltage contro=
lled amplifier like those at http://www.thatcorp.com/Blackmer_Voltage-Contr=
olled_Amplifier_ICs.shtml .

Harold


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