[sdiy] Thomas Henry Potpourri Module

[prototek]

    I was just reading through the old Thomas Henry book "Build a Better
Music Synthesizer." I noticed a really simple (but cool) project called the
"Potpourri Module." Its configured around a TL084. Overall it functions as a
Lag Processor, CV Inverter, and a Comparator. Looks like a great "utility"
module. Has anyone built one of these before?

                Thanks,
                John