Geo Synthesizer Tutorial #2

Added to this post.

Yamaha CS-50 Analog Synthesizer 4 voice

via this auction

"The Yamaha CS-50 has 4 VCO's and 4 VCF's. It has 4 note polyphony. You can play 4 notes at a time.

The keys work perfectly. The PW and PWM potentiometers are damaged. But the Pulse and Saw wave VCO's still work fine. This CS-50 works well enough to play.

The filter ENV works. The VCA ENV works, except for the DECAY pot is not 100% functional.

The "Tone Selector" section : String 1&2, Brass 1&2, Flute, Electric Piano, Clavichord, Harpsichord, Guitar1&2, Funky1&2&3, & Panel: All of these work fine.

The "Transposition" section ": 1&2 OCT DOWN, Normal, 1 OCT UP ...works fine

The "touch response" controls: "Sub VCO, Oscillator VCF, Brilliance and Level" need servicing.

The "Foot Controller" jack has a problem. I tried plugging in an Alesis Foot Controller, and the CS-50 blew a fuse. (The "-15V" fuse)

The "External IN" jack works, and it causes VCO FM, VCF FM, or AM. The sound at the "External IN" jack is also heard at the Main OUT jack.

All of the other controls work fine.

I added an RC4558 op-amp to boost the output sound.

The sound is very good. This synth is fun to play. The VCO, VCF and VCA are all 100% analog. No DCO's or anything like that.

There are a few scratches on the front panel.

The signal to noise ratio is about -50dB.

The CS-50 is a "Performance Synth." It is meant to be played by hand, like a piano. There is no onboard sequencer. There is no Midi IN or OUT. There is no GATE CV INPUT. There are no CV inputs at all."

Access Virus C Synthesizer

via this auction

Click on these for the super size shots.

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Doepfer A118 Filtering with A120 VCF Low Pass Filter Part Two

YouTube Uploaded by raulsworldofsynths on Oct 3, 2011

"Part Two Ongoing Demonstration of Filtering white and Colored Noisefro, the A118 Noise module with the Doepfer A120 VCF Low Pass Filter. Modulation Capabilities also explored wwith A147 VC LFO and A145 LFO. Sound and Video by Raul Pena."

Also added to Part 1 here.

The water runs out

YouTube Uploaded by snipz on Nov 10, 2011

"All modular.
Trying out Phonogene with a sample captured with my iPhone whilst in Granada, Spain.
Also first use of Double Andore as a standard Envelope/VCA...gotta spend more time with this module!
Pretty cool making chords using the Quantimator and the MFB triple oscillator.
Plus a lot of other stuff going on too..."

The Key (Synthesizer Guitar) with Video Out

via this auction

"The Key music instrument controller, an interactive musical instrument anyone can play. These guitar like synthesizers rarely surface these days especially in mint condition. I believe this was manufactured in 1995. The Key is no longer in production and I know little of this fascinating (guitar) synthesizer. Included is everything which was originally packaged with the original box. I tested it and it works great. Feel free to ask any questions and add this to your museum.

* SongPac Rom Cartridge (comes with 1) with U2, STP, Gin Blossoms, Eric Clapton, Melissa Etheridge, Green Day, Billy Joel, Nirvana, The Beatles

* Unopened VCR video tape, keycoded for interactive play. Rock along with 13 of the hottest videos (whoa)!
* MX1 mixer Box
* Power Adapter
* RCA Cables, 2 line cable to link 2 Keys together
* guitar strap
* Midi out
* Antique"

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Just Music - Hamburg - MATRIXSYNTH T Sighting!

YouTube Uploaded by MR2201963 on Nov 10, 2011

"While in Germany for my ADR Surgery, my brother and I took the IC Train to Hamburg, and I found Just Music store... huge facility, and lots of great product in store... here's just a quick sample of whats there... Great staff..."

via Mark on Facebook. Thank you Mark!

Update: Link added the the MATRIXSYNTH T Hall of Fame and I created a new MATRIXSYNTH Bling label for these. I went with MATRIXSYNTH Bling instead of MATRIXSYNTH Ts to cover MATRIXSYNTH magnet and cards as well. There's quite a few posts up so be sure to check out the label below.

Crumar Bit 99 Demo

YouTube Uploaded by TheUnifaun on Jul 1, 2009

"Una breve performance del mio bit99.
Tutti i suoni sono stati campionati dal bit99 e gestiti con relativi effetti con Fl Studio 8."

Korg Mono Poly Synthesizer & Flight Case

via this auction
more pics
"Korg Mono / Poly - MP4 Analogue Synthesizer
Professionally Restored - Fully Calibrated & Serviced
Red Oak Sidepanels - Rebuilt/Reinforced Hardwood Housing

Was fully serviced by an experienced analogue synthesizer technician 10 months ago
All the key contacts were either replaced or respaired (no dead keys)
All nobs, switches and tactile buttons were lubricated/cleaned/restored and are static free
All internal connections were tested, reinserted and resealed
All keyboard plastic brackets were replaced
Was given a complete overhaul/testing including a full calibration and tuning
It was over $300 just for the full servicing!!
Every circuit and system is 100% functional and working great
The synth wood/housing was rebuilt with beautiful Red Oak hardwood
The bottom of the synthesizer was repainted
New reinforced hardwood triples the mono poly's structure"

analog stuff

YouTube Uploaded by miguelzn on Nov 10, 2011

"analog acid techno with some analog synth a fuzzy distortion!
by
www.soundcloud.com/mgl
www.soundcloud.com/keno"