Envelope follower video

ARP 2600 (-based) envelope follower

This is an envelope follower (EF) module in Kosmo format with mic and instrument preamplifiers. I looked, in simulations and on the breadboard, at several envelope follower designs (you can read about some of that by following the envelope follower tag) and ended up deciding to go with a design based on the ARP 2600 […]

Bissell envelope follower part 2

I tried replacing (in the simulation) the 2N3904s with MOSFETs. Not that I know anything about using MOSFETs. But the result looked a lot better: Here the gray trace is the EF output. Very fast rise, though it rounds off the sharp peak. One thing you might notice is the cap doesn’t discharge all the […]

Bissell envelope follower

I decided to breadboard the Harry Bissell envelope follower, which uses a much different method than the common rectifier and filter approach. Bissell’s claim is that it yields fast response with no ripple. The article describing it is here (PDF, on pages 2–3). I get the general idea of what Bissell is doing here though […]

On the breadboard: Envelope follower

I’m breadboarding an envelope follower based on the ARP 2600 schematics. Funnily enough, what I have available to feed it notes for testing is… a Behringer 2600. For instance: The top trace (yellow) is the output of the B2600 AR envelope generator. It’s used to control the B2600 VCA, with a triangle wave input, and […]