MATRIXSYNTH

Sunday, May 06, 2012

Korg 800dv SN 770398

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via this auction

Home made analogue mono-synth from R.A.Penfold Book

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via this auction

"Here for sale is a home made analogue mono-synth constructed from a book by R.A.Penfold called "Electronic Synthesiser Construction"... Link to the book is here [on Amazon]

The synthesiser was built by me in the early nineties and then forgotten about in a cupboard for many years, now during a studio clear out it's resurfaced and I thought it should get some use somewhere else in the world! :-)

The synth concept follows the classic layout of a single VCO with Square / Tri / Pulse waveforms, Mixer, multimode resonant 12db/oct VCF and finally VCA. There is also an LFO and ENV generator for modulation of the VCO, VCF and VCA..

The connections round the back are CV, Gate In, Audio In (routed to mixer and then on to the VCF) and the main Audio Out - all are on 1/4inch jack sockets.

It sounded great back in the day but now it has some faults so I'm listing it as For Parts Or Not Working.
I've tested it and established the following issues.
LFO is not working,
VCO tuning is prone to wander around,
Mutimode VCF seems to sometimes function as a lowpass and then wanders into bandpass mode,
VCF resonance control is dodgy.
VCF is easily over-driven by the levels in the mixer - perhaps this VCF behaviour is not exactly a fault but I thought it was a tad harsh but maybe that's just me..."

Update:

penfold1

YouTube Published on May 6, 2012 by monkeyb0y999

Home made analogue mono-synth from the R.A.Penfold book "Electronic Synthesiser Construction". Vid2

YouTube Published on May 6, 2012 by monkeyb0y999

"Demo of a home-brew synth I built in the nineties from the excellent R.A.Penfold book "Electronic Synthesiser Construction".

It's a single VCO affair with an OTA based 12db/oct state variable VCF.
The sequence is from a x0xb0x controlling the synth over CV/Gate.
I'm selling it on eBay and the video has been posted to highlight a number of faults the synth has like the fact the LFO no longer functions, the tuning wanders and some of the controls are a bit flaky. Will prob leave it up on youTube after the auction for historical interest."

Rare 1974 Maestro Filter Sample Hold

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via this auction

"1974 Maestro Filter Sample/Hold effect pedal ( also known as the Oberheim Voltage Control Filter VCF ) This is one of the funkiest envelope filter guitar synth pedals out there! The last one that sold on Ebay was in beat condition and sold for over $500! According to the pot codes this pedal as made during the 42nd week of 1974..."

Synare 2 Analog Percussion Synthesizer

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YouTube Published on May 6, 2012 by moogplayer

"Selling this rare gem on eBay. This model was manufactured from 1976 to 1982 and was Star's flagship model. This was very much like the Synare 1, with one oscillator with sawtooth, and pulse waveforms, white noise generator, etc. But this had assignable functions, ie. routing the LFO to control certain parameters at once. The LFO also added a sawtooth waveform You could also select a wide range of octaves for the pitch to sound at, along with a fine tune function. A major adjustment was the introduction of a fairly advanced sequencer with different patters, and the ability to change patterns and octaves. You could also adjust the speed and the note(s) sounded by the sequencer. This model features 16 pads instead of the previous four. Retail price in 1976 was $1,395.00. This high price has made the Synare 2 very rare. According to one of Star's founders, about 50-75 of these units were built."

Synares on eBay

Roland Sh201 Synth Va performed by S4K ( space4keys )


YouTube Published on May 6, 2012 by Space4Keys

"Roland Sh201 Synth Va performed by S4K ( space4keys )

http://www.space4keys.com
http://www.keyboardsolo.com"

Roland SH-201s on eBay

Extended Video Review Of Arturia Spark Vintage Drum Machines


YouTube Published on May 6, 2012 by airusersblog

"A show and tell review of Arturia Spark Vintage Drum Machines."

Custom Synth "funkagenda" Custom White TB-303


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CustomSynth.

AHNE 2012 360 Panorama


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When you get there click the screen and drag to look around.

AHNE 2012 Pics by alt_mode


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SoundBoxes Workshop Berlin with DEREK HOLZER


via macumbista.net

"May 26 & 27, 2012, Time 11-19
Presentation Sunday May 27 2012, Time 20.00 (venue TBA)

Discover the hidden sonic qualities of objects from our everyday world in this workshop, combining the arts of electronics, noise, sculpture and collage. The basic elements we will employ are a wooden box, a speaker, a small audio amplifier, and a contact microphone. To this, brave box-builders will add their own found objects, graphics, images, memories and ideas to create a unique electroacoustic cabinet of curiosities.

No previous electronics experience is necessary for this workshop."

Full details at the link above.
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