Monday, 21 September 2015

Dream IV

Previous - Subsequent

Three problems:  modules are a tight squeeze; one of the power supplies is on the blink; and my Doepfer Envelope is too deep.

A shallower, narrower ASDR would help significantly and I try to pick up a power supply from Maplin on Thursday.

If I am still short of HP, I'll make do with one RVS and take a VS from the spare S/H.

Sunday, 20 September 2015

Dream III

Previous - Subsequent

Maker Model Links Notes
Wiard Noisering Muff1 - Muff2 - Wiard Two Muffwiggler threads and and an old Blacet manual.
Pittsburgh Chain Reactor Product page
Wiard Anti-Oscillator Muff More Muff
Doepfer Inverter Manual
Doepfer Clock Divider Manual
Wiard Wogglebug Manual
Pittsburgh Sequencer Product page
Doepfer Sample and Hold Manual
Doepfer Envelope Generator Manual
Doepfer A-132.3 Dual VCA A-130 no manual, simple exp VCA link

Thursday, 17 September 2015


new rackold blog
Links: EMIS Postmodular SchneidersBuero Thonk MODULARgrid
Rubadub - clicksclocks

Dream II

Previous - Subsequent

This Link is to various documents on the DM, including Strange's book. A posting on

The list of sources is:

1. From Electronic Music: Systems, Techniques and Controls by Allen Strange
2. Don Buchla interview transcript from http://
3. From: Musical Applications of Microprocessors by Hal Chamberlin
4. Wiard Model 1210 Noise Ring manual
5. Grant Richter’s notes on the Noise Ring Entropy Expander
6. Doepfer A-149 manual

Tuesday, 15 September 2015

Pitts micro: Dream


The Pittsburgh micro arrived. It is lovely but the cheeks are seriously overpriced: nevertheless, its beauty is confirmed. I'll set it up to run while I finish the build.
I'm tempted to try a Dream Machine in the micro first.

Above is the Strange original, left is the Doepfer version.

The hardware requirements for the original are:

  • two random voltage sources
  • an 8-step sequencer
  • one VCLFO
  • one audio oscillator
  • one sample and hold
  • one voltage inverter
  • two VCAs
  • and and envelope generator
  • the first RVS gets a kick on each 8th sequence step so a clock divider might also be needed.
While I have all the necessary modules, not all of them will fit in the micro, depth 52 mm and 36mm in places. I guess many of the Pittsburgh modules will fit in a Pittsburgh micro and they include a sequencer (14HP, depth 25mm) and a utility module (6HP, depth 43mm) that includes S/H and INV.

Thursday, 10 September 2015

Pittsburgh micro

This is a thing of beauty, found at Rubadub. I have one small cell, so I'm tempted. I would also like to build something similar on the cheap. The only problem would be the power supply.

[later that day] Couldn't resist it - I bought the cheeks and another empty cell. The cells are quite shallow and so the range of modules will be restricted. When I build a knock-off I'll make it deeper.

The range of modules in a Pittsburgh System 10 is quite tempting at £382, but I managed to resist that.