RT-311 Swarm Oscillator & RT451 Dual Multimode Filter & Replika Delay
by Joerg Schaaf
"You are listening to the first demo of the RT-311 SWARM Oscillator."
You can find a pic of it previously posted here.
Monday, March 28, 2016
Rare Early Model 1968 Moog Model 950 Modular Keyboard Controller with "Hold / No Hold" Switch
Here is an interesting bit of Moog synth history in via Mike Metz of Thesis Audio Service.
"Attached are photos inside a VERY rare Moog 950 modular system keyboard controller that we are restoring for a client.
This 950 keyboard, made in 1968 was one of the first 950 series keyboards ever made. It has a 'Hold-No Hold' switch instead of the "Glide- No Glide" switch found on later models made after 1969. The circuit has two reed relays nside, rather than the usual one. The first relay closes at key down and produces the standard Moog 'S' trigger for the modular system. The second relay closes at key down also. This relay's contacts are routed thru the 'hold' switch and sent to the sample and hold circuit where they short out the hold capacitor when the switch is set to "No Hold". This way, when you press a key, the standard CV is sent out, but when you release a key, the CV drops to zero, rather than be held by the sample and hold circuit through the release time. This sends the pitch of the oscillator from audio to basically zero when the key is released, making it appear that the note disappears, or "No Hold". Actually, the oscillator will drop to it's lowest frequency, perhaps around 1HZ, so you might hear a little 'putt-putt' noise from the oscillator, but not the correct audio output.The later 950 keyboards changed the rocker switch function to the more common "Glide- No Glide", yet both keyboard versions kept the same 950 model number. There was no mention of this early version 950 in any of the Moog documentation that I have ever found.
The other fascinating thing about this keyboard is seen in the photo of the bottom of the circuit board. There are hand made scribe marks on the boards around the hand-laid PC traces, probably put there during inspection during assembly. We can't be certain who made these marks on the PC board, but being from 1968....???"
The serial number for this one is 1008.
These aren't common. Only three with the "Hold/No Hold" switch have been featured on the site before, one in 2007, one in 2010, and one in 2011.
Roland MKS-80 with Roland MC64-C Cart
Access Virus TI Desktop Synth
Access Virus Indigo 2
SR JV80 98 Experience II JV2080 Expansion
Published on Mar 28, 2016 zbr_audio
"Scrolling through presets from SR JV80 98 Experience II card inside JV2080, trying to jam something on each"
Easel Spring Rites
by bartonmusic aka Todd Barton
"a brief improvisation on the Buchla Music Easel . . ."
New Korg Volca FMs Available in the US
Note: Auction links are affiliate links for which the site may be compensated.
It looks like the KORG Volca FM has hit the states. Several units are currently available via this auction.
"Welcome to the Korg Volca FM, a three-voice polyphonic synthesizer that works in Poly, Mono or Unison modes. It also features octave and transpose controls, along with a velocity slider.
There's also a rotary control for scrolling through different algorithms - to control the interplay between the six operators - and a rotary for selecting presets. Plus, there's an onboard arpeggiator, with a huge selection of patterns and rates available, along with a Chorus effect with just a simple on/off control.
The Volca FM features a six-operator engine attached to a ribbon-style keyboard/step sequencer, the same as the ones found on the rest of the Volca range. A simple set of controls gives users control of the attack and decay lengths of the carrier and modulator signals, as well as LFO with depth and rate controls.
Just like the other Volcas, there's a variety of interesting performance features, which include the usual Pattern Chain, Active Step and Motion Sequencing. This allows users to record automation. With the FM, even the algorithm and arpeggiator settings can be automated, which is very unique and enables the creation of some super out there loops and synth lines.
Connectivity wise, the Volca FM features a MIDI in and the same simple sync ports found on the rest of the range. The FM can be loaded with sounds from the venerable DX-7 via SysEx. While the engine architecture of the FM isn't exactly the same as the DX-7's, it will still load the operator and algorithm settings, which should closely approximate the classic DX sounds.
Features
3 voice polyphonic FM synthesizer
Poly, unison and mono modes
Octave transpose controls
6 operator engine
Ribbon style keyboard/step sequencer
Pattern chain
Motion Sequencing for automation
Algorithm and arpeggiator settings can be automated
MIDI in, simple sync in and out (the same as the rest of the Volca series)
Can be loaded with DX-7 sounds via Sysex"
Algorithm & Parameter Lists pictured below.
It looks like the KORG Volca FM has hit the states. Several units are currently available via this auction.
"Welcome to the Korg Volca FM, a three-voice polyphonic synthesizer that works in Poly, Mono or Unison modes. It also features octave and transpose controls, along with a velocity slider.There's also a rotary control for scrolling through different algorithms - to control the interplay between the six operators - and a rotary for selecting presets. Plus, there's an onboard arpeggiator, with a huge selection of patterns and rates available, along with a Chorus effect with just a simple on/off control.
The Volca FM features a six-operator engine attached to a ribbon-style keyboard/step sequencer, the same as the ones found on the rest of the Volca range. A simple set of controls gives users control of the attack and decay lengths of the carrier and modulator signals, as well as LFO with depth and rate controls.Just like the other Volcas, there's a variety of interesting performance features, which include the usual Pattern Chain, Active Step and Motion Sequencing. This allows users to record automation. With the FM, even the algorithm and arpeggiator settings can be automated, which is very unique and enables the creation of some super out there loops and synth lines.
Connectivity wise, the Volca FM features a MIDI in and the same simple sync ports found on the rest of the range. The FM can be loaded with sounds from the venerable DX-7 via SysEx. While the engine architecture of the FM isn't exactly the same as the DX-7's, it will still load the operator and algorithm settings, which should closely approximate the classic DX sounds.
Features
3 voice polyphonic FM synthesizer
Poly, unison and mono modes
Octave transpose controls
6 operator engine
Ribbon style keyboard/step sequencer
Pattern chain
Motion Sequencing for automation
Algorithm and arpeggiator settings can be automated
MIDI in, simple sync in and out (the same as the rest of the Volca series)
Can be loaded with DX-7 sounds via Sysex"
Algorithm & Parameter Lists pictured below.
Roland SH101 Synthesizer w/ Extras
Note: Auction links are affiliate links for which the site may be compensated.
via this auction
"Syntaur slider kit was professionally installed. Comes with PSU, copy of manual, mod grip and strap hardware."
via this auction
"Syntaur slider kit was professionally installed. Comes with PSU, copy of manual, mod grip and strap hardware."
Sequential Circuits Instruments Pro One SN 3434
Note: Auction links are affiliate links for which the site may be compensated.
via this auction
"This Pro One is fully functional & in excellent cosmetic condition, J-wire keyboard. Recently tuned up / calibrated, plays very nice. Cleaned the J-wires, keys respond very well. No scratchy pots. Cosmetically, super nice clean shape on the front, overall quite clean."
via this auction
"This Pro One is fully functional & in excellent cosmetic condition, J-wire keyboard. Recently tuned up / calibrated, plays very nice. Cleaned the J-wires, keys respond very well. No scratchy pots. Cosmetically, super nice clean shape on the front, overall quite clean."
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MATRIXSYNTH - EVERYTHING SYNTH
© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH
