Voltage Controlled Amplifier
The EMW VCA 101 is a high quality Voltage Controlled Amplifier with a two channels audio mixer and envelope level adjust. The input mixer is a helpful and versatile resource when dealing with more than one input signal.
http://www.electronicmusicworks.com/detalhes.asp?id=91&produto=69&loja=EURORACK
No info about availability.
$70