putting a mono-out jack on SID and FM synths.

Design Concepts
1

I’m thinking of putting a simple mixer in what will become my SID and FM synths so I can simply plug in an amp and go.  This circuit: http://www.musicfromouterspace.com/analogsynth/monomixerpage.html seems  appropriate.  Comments?

2

A textbook summing amp with a headphone amp added in for kick’s. Should do the trick.

3

Well, while it’s not being the most elegant way to design a mixer, it will definitely work! I used to have similar gadget built in early 90’s for my personal use. You just need to have a dual-voltage supply to power up the thing. For the record, Tomi Engdahl’s page lists several other mixer designs as well at: http://www.epanorama.net/links/audiocircuits.html#mixer

Regards, Petri

4

The object is not elegance, but simply a mono output.  Sometime later I’d like to make a simple 1U mixer specifically for synth use.  That link looks like a very good place to start.

Thanks!