On Sat, 24 Aug 1996, Stuart Allman wrote:

> I need to find a part to substitute for the SSM2161.  It's basically a 4
> channel volume control with a serial interface for transfering the volume
> level to the part through a serial port.  The whole control system is
> digital, so it would be ideal to keep the volume control digital also.

Well I have been meaning to start using the LMC1982 Digitally-Controlled
Stereo Tone and Volume Circuit ... (name is too long :-) ) from National
Semiconductor but have never gotten around to it.  It has two channels and
you can select between two different inputs.  It is simple to interface, 3
lines - id, clock and data.  I got the data sheet from their web page (it
was listed a few messages back).  There are others in the series as well
LMC1983 and LMC1992.  They aren't cheap, the LMC1982 lists a $9 at
Digikey.

Md