MATRIXSYNTH

images via this auction
"NEW OLD STOCK Roland MPU-105 MIDI Output Selector. It has never been sold. Purchased by us, M.E.S. Music Equipment Sales Ltd., as an authorized Roland dealer in March 1985, it was somehow overlooked and remained on a shelf for 23 years. The MPU-105 MIDI Output Selector can distribute the signal from a MIDI device (master keyboard, sequencer or computer) to up to 5 MIDI destinations (other keyboards or sound modules). The red LED associated with each push button tell you which instrument is currently in use. The green MIDI LED located above the on-off switch serves to tell when there is MIDI activity. Any number of the 5 Select Buttons may be used simultaneously...

The MPU-105 measures 8-9/16" Wide x 1-13/16" High x 6-3/16" Deep and is a standard half-rack device..."

ROLAND MPU-104

via this auction

"NEW OLD STOCK Roland MPU-104 MIDI Input Selector. It has never been sold. Purchased by us, M.E.S. Music Equipment Sales Ltd., as an authorized Roland dealer in May 1985, it was somehow overlooked and remained on a shelf for 23 years. The MIDI outputs of up to 5 MIDI devices can be connected to the MIDI inputs of the MPU-104 MIDI Input Selector. The THRU MIDI signal is connected to the destination (computer, sequencer or sound module) MIDI input socket. The desired MIDI device is selected pushing one of the 5 front panel buttons. A red LED indicates the active button. Only one Select Button may be activated at a time... If more than one button is accidentally selected, the lowest number will have priority... The MPU-104 measures 8-9/16" Wide x 1-13/16" High x 6-3/16" Deep and is a standard half-rack device..."

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Noisering Vs. MiniWave

YouTube via kwote
"I built the MiniWave today and installed the Scale Quantizer Rom. This is a demo of that Rom in use. The random voltage is coming out of the Noisering then multed to the pitch of VCO 1 and into the MiniWave which is then sent to the pitch cv of VCO 2."
see the write-up on Kwote Music

Paia Fatman Analog Synth

flickr by ctpctp

"connecting the leads on the circuit board to the front panel pots and switches...one row at a time. I'll have that done soon, and might even power it up this week."