korg

flickr by prudencio fonseca.

Korg MS20

Rhodes Chroma

Title link takes you to shots via this auction. BTW, if anyone reading this picks it up, be sure to check out the excellent Rhodes Chroma site and join the group. It really is a great resource and worthwhile group to join.

Note the Chroma doesn't have any knobs but it has an editing slider and each button you see serves as a parameter selection in edit mode. Like the MOOG Source, you select the parameter you want to edit with one button and you then use the slider to edit. The only real challenge is understanding what the two digit led is displaying for each paramater. For things like cutoff and env settings this is easy enough, but for mod routings you might need the manual handy when first learning the synth. The manual is available at the Rhodes Chroma site.

Duckon 2007 Singing Tesla Coil

video upload by kmelwing

"This is a solid-state Tesla coil. The primary runs at its resonant frequency in the 41 KHz range, and is modulated from the control unit in order to generate the tones you hear.

What's not immediately obvious in this video is how loud this is. Many people were covering their ears, dogs were barking. In the sections where the crowd is cheering and the coils is starting and stopping, you can hear the the crowd is drowned out by the coil when it's firing."

via HarriL. And then there was this.

TickTock

Chris put up a new Buchla 200e noodle titled TickTock. Title link takes you to the track, where you will also find previous 200e tracks by Chris.

BTW, if you want to see his setup pictured here live, he will have it at the Garden of Memory show this Thursday. Update via wavedeform in the comments: Here's a link to a write up in the SF Chronicle about the show.

Thomas Henry Voltage Controlled Quadrature Function Generator

Title link takes you there.
Some snips:
"To have a quadrature waveform, you really need at least two waves. The first wave could be said to be at 0 degrees, and the second wave could be said to be in quadrature with that wave - in other words, the quadrature waveform is 90 degrees out of phase to the zero degree waveform. The frequency of both waves is the same - it's the offset in phase between the two waves that defines the function.

Figure 1 [top two] illustrates this offset - notice how the lower triangle waveform crosses the center line 90 degrees "behind" the upper triangle wave.

It's easy enough to get two waves at the same frequency and one hundred eighty degrees out of phase - that only requires simple inversion - the 180 degree waveform is merely the exact opposite of the 0 degree waveform. But, to get an offset of 90 degrees, well, that takes some doing....

Applications for the VCQFG
Thomas' mention of the use of the VCQFG with his SuperSeque design above is just one of a plethora of applications. Consider that, with this module, you have access to four triangle waveforms that are at the same frequency, but have rise and fall segments offset symetrically over time."

Oberheim OB-SX Voic Board

ac posted this image on AH. I asked him if it would be ok to put up a post here as a follow up to this post (and those linked in it), touching on the differences between the OB-X, OB-SX, and the OB-Xa. He gave the thumbs up. Thanks ac. This is a really nice shot of the board. Click on it to see the detail. You will see the following chips.

2 x CEM3340 VCO
2 x CEM3310 VC Envelop
1 x CEM3320 VC Filter

You can read more about the actual chips here.

Blacet Wiard Livewire Frac Rack Modular

Click here for shots via this auction, include hires version sent my way via the seller.

Details:
Blacet: Binary Zone, Filthy Filtre, Micro LFO, MiniWave & two frac racks w/ power supplys and power leads.
Wiard: Joystick, Joystick Axis Generator, NoiseRing.
Livewire: Frequensteiner.
The Miniwave comes with 4 eproms, they are: Miniwave Eprom A, Miniwave Socket Rocket, GR-new-256 & GR-PPG/P-VS.

Roland SH-101

Title link takes you to shots via this auction.

Update: This one probably should have gone up on Matrixsynth-b. The image looked a bit better to me on first look. Something about the reflections and the case. Anywhoo... If you like synth shots, know there's more on Matrixsynth-b.

As always, check out the comments.

Sequential Circuits Prophet T8

Title link takes you to shots via this auction. Not the biggest shots, but you don't see these often. If you are considering this or any other action I post, ALWAYS be sure to read the auction details in full. I only post the bits that interest me here and I DO NOT police auctions. Always check the comments to see what others say.

Details:
"This was the flagship of the SCI line and their last (and greatest analog synthesizer). Apparently, there were only 500 units produced before the project was shelved due to competition from the much cheaper Yamaha DX-7. I am the second owner of this synth. It has been gently used in my smoke-free studio.

Brief specs:
- 8 voices
- 2 VCO's per voice
- Classic SCI Poly-Mod section
- MIDI control of various parameters through velocity and/or pressure modulation
- Semi-weighted keys
- Velocity and aftertouch (The Prophet T8 was renowned for its pioneering system of aftertouch)
- Single, Split, an Double modes- The T8 can be played as a single synth (one patch), two separate synths (upper and lower patches), or two patches can be played at once"

JoMoX Xbase 999

Title link takes you to shots via this auction.