VCA chips

[Don Tillman]

Hiya.

JH's interpolating scanner work inspired me to come up with some
designs of my own, and I'm writing up an article about them that I'll
be posting soon.

And so... I've been looking at the VCA issue.  JH uses SSM2024's,
clearly a good choice for hifi reasons, but it appears from the Analog
Devices web site (http://www.analog.com) that these are no longer in
production and a newer chip called the SSM2164 is the one to use.
Okay fine; and look, the data sheet for the SSM2164 mentions that you
they're designed to replace the SSM2024 with minimal circuit changes.
Cool...

Except they fail to mention that the polarity of the control input is
inverted.  

Before I phone Analog Devices, does anybody have any insight
recommendations on this?  Any experience with the 2164?

  -- Don