Jooris Benny has shared some great pictures of an ARP 2500 synthesizer.
The ARP 2500 is a synth classic, and it was the first synth I ever used, at the University of Kansas, before I could afford my own!
It uses a combination of patch chords and matrix switches to create connections. Each module’s panel has signal [...]

Alpha Juno Control is a free, open source Mac OS X patch editor for the Alpha Juno.
It will let owners of Roland’s Alpha Juno keyboard control patch parameters via MIDI from their Mac.
via Moogulator

Here’s something different - Andrew Benson’s battery-powered wrist synth, aka the Whisper Synth:
Here’s another video of the whisper synth in action. I tweaked the circuit a little bit to make the sound a little louder, and am using a 9v battery now with a 7805 regulator to power it. The little lithium coin cells didn’t [...]

Over at The Steampunk Workshop,  Jake von Slatt has a nice write up on a Jules Verne inspired analog synthesizer with etched brass control panels.
While we’ve seen hundreds of nice modular synths, you have to admit the etched brass panels on this are pretty sextacular.
Here’s what the synth’s creator has to say about [...]

This video, by Oliver Chesler of Wire to the Ear, demos the Voice of Saturn synth DIY synthesizer & sequencer kits. 

This is a cool idea: The August issue of Otona No Kagaku (Japanese for Adult Of Science) will be a synth themed edition called the Synthesizer Chronicle. It will feature interviews from Ryuichi Sakamoto, Tomita and Fumitaka Anzai.
With the magazine comes the SX 150 Gakken Analog Synthesizer - which appears to be a basic battery-powered [...]

Music Thing’s Tom Whitwell has posted a short review of the Chimera BC16 mini-synth, a tiny semi-modular synthesizer.
The Chimera BC16 is a $269 miniature patch synthesizer, offering a VCO, LFO, 24dB VCF, VCA, envelope generator, noise source, ring modulator and headphone amplifier - all in a crisp, white, round, CNC machined acrylic housing the same diameter [...]

Die Knöpfe der Kultmaschinen drehen im analogen Synthesizerpark im Kunsthaus Graz.

AtomoSynth has introduced the Abyssal, an analog photo-noise-machine & oscillating-filter:
This synth features one square and saw waveform VCO (voltage controlled oscillator) with a huge pitch range, from subsonic to ultrasonic sound controlled by a big photocell (pitch control) allowing to play it like a photo Theremin.
One square and triangle waveform LFO (low frequency oscillator), that [...]

Tom Whitwell, of Music Thing, put together this quick demo of the Chimera BC16 mini modular synthesizer.
Says Whitwell: “Soundtrack is just random tweaking and patching, good bits edited from five minutes of noise.”

Electronic Peasant has posted a great series of photos detailing his very cool SynthCase synth DIY project:
This project is the first in a series of synthesizer “multi-modules” that will be built in heavy-duty equipment road cases. A friend had passed on to me a bunch of used cases from obsolete equipment that were being disposed [...]

Here are a set of video demos of the Starkey Hearing Science modular synthesizer:
Starkey Hearing Science modular synthesizer Pt 1

Here’s what poster scienceforce has to say about the system:
Starkey Hearing Science analog modular synthesizer laboratory. It is a scientific instrument, with many particular synthesis features… with this gear you can also process any external signal [...]

Marc Doty’s introduction to a new series of videos about the Korg MS-20. Doty plans on posting the videos to the new SonicState.tv site, which is a sort of YouTube clone focusing on music.
Here’s the first episode of the series at SonicState.TV:

This is a video demo of the Formant Synthesizer, a synth DIY project published in Elektor magazine between 1977-1979.
It was the first mini analogue synthesizer around with modular construction that could be built at home at an affordable price. A tribute article appears in Elektor, April 2008.
via Elektor

Speaker Synth is an interesting synth DIY project - a five-speaker array with no external audio input, created by Lesley Flanigan. The only components in the system are the instrument’s speakers, piezoelectric microphones, amplifying circuits, and the hands of the performer.
Speaker Synth is played by positioning individual piezo microphones with their corresponding speakers and manipulating [...]