From vance@netcom.com Wed Dec 13 10:19:45 1995 13 Dec 95 13:19:33 +0500 30 Nov 95 08:41:08 +0500 id FAA06272; Thu, 30 Nov 1995 05:34:01 -0800 Date: Thu, 30 Nov 1995 05:34:01 -0800 From: vance@netcom.com (Vance Gloster) Cc: analogue@hyperreal.com Subject: Re: VCA Problems I'm having some trouble creating an ADSR-generator. It's not that the ADSR generator doesn't work but the VCA is gain-controlled. So the ADSR should be 'flipped' around and then turned up to the no-gain level. Something like this: The following schematic shows an inverting amplifier with adjustable offset. The pot tied to +V and -V adjusts the offset. Good luck! 10K _____/\/\/\_____ | | 10K | |\ | ADSR out ________/\/\/\___|______|- \ | | \____|_________ +V _____/\/\/\____ -V ______| / |____________| |+ / |/ -Vance Gloster vance@netcom.com