Comments for Richard Brewster's Synthesizer

Comment on Psycho Bubbles by Ross Bencina

Ross Bencina — Tue, 16 Feb 2010 06:12:34 +0000

Nice one You could try using the Psycho as a live input into AudioMulch using SoundIn and then granulate it live with the DLGranulator (similar to BubbleBlower except granulates a live input).

Comment on MOTM-480 3u Dual Filters by Paul Newman

Paul Newman — Fri, 18 Dec 2009 13:59:12 +0000

Ah, ok, that makes sense. Thanks!

Comment on MOTM-480 3u Dual Filters by Richard

Richard — Fri, 18 Dec 2009 12:46:47 +0000

I think Tom Adam left one end of each of the four resistors mentioned sticking up with a wire soldered to them, thus avoiding having to cut traces. This isn’t mechanically rigid and risks breaking resistor. I prefer to solder the resistor into the board at both ends, one end having the wire snugged under it, for mechanical strength. That means you have to cut the four traces. This is DIY! It’s up to you.

Comment on MOTM-480 3u Dual Filters by Paul Newman

Paul Newman — Thu, 17 Dec 2009 19:54:32 +0000

So it’s possible to build this without cutting the traces? No issues or other workarounds to make it work that way?

Comment on Teezer Through Zero VCO by Ian Fritz

Ian Fritz — Sat, 15 Aug 2009 22:42:12 +0000

Richard — I worked with David some in developing his 15V mods and I think they are fine. I prefer the series-zener solution somewhat, because it provides extra PS decoupling between the different parts of the circuit. Oh, those were exciting times, back in the 70’s.

Comment on Teezer Through Zero VCO by Richard

Richard — Sat, 15 Aug 2009 20:12:41 +0000

Ian, thanks for the comments! And the link to Dave Brown’s Teezer page, which I had not seen before, even though I frequent Dave’s site. I will have to ponder his circuit changes for 15 volt supplies, although my Teezer works fine with only your recommended zener diode modifications.

Ian, I remember reading your articles in Electronotes in the late 1970’s. I have a complete hard copy of EN.

Comment on Teezer Through Zero VCO by Ian Fritz

Ian Fritz — Sat, 15 Aug 2009 19:23:15 +0000

Thank you for taking the time to write such a nice review.

The Tri wave is derived from the Saw, and so will always have a bit of an anomaly. To see an example of a unit with the Tri trimmed to what I consider an acceptably small glitch please see David Brown’s scope shots:
http://modularsynthesis.com/bridechamber/tzfm/tzfm.htm
and very importantly his assembly note #6. This should help if you need better symmetry.

Thanks again!

Comment on Blacet Dual State Variable Filter by Steven Clements

Steven Clements — Tue, 04 Aug 2009 20:01:14 +0000

I just ordered the PCB’s and pots with knobs from John. I can’t seem to find the BOM anywhere I would assume that he sends them. Richard this looks great. I was thinking of putting it in a MOTM or synth.com style panel… but maybe I’ll stick with Blacet… oh too many options

Comment on Studio 2009 by Paul Davis

Paul Davis — Sat, 25 Jul 2009 15:36:19 +0000

Hey Rich — Nice to hear your name.

Comment on Studio 2009 by Richard

Richard — Tue, 21 Jul 2009 23:55:37 +0000

Nice to hear from you, Dave. The synth didn’t start out so huge, but in seven years spare time I guess it grew! Glad to hear the old equipment at the Experimental TV Center is still being used, too.