Korg MS10 semi-modular synthesiser.
This is the MS20's little brother and I picked it up for under £100 a long time ago. In its life it has had a few keys snapped (I got replacements from someone in Australia) and been immersed in floodwater in someone's cellar. I cleaned off the rust and it still worked perfectly. That's the beauty of solid state electronics!
Although most of the features that make the MS20 exciting are missing from the MS10, it still has a nice sound, the PWM is cool, the filter is really weird and aggressive and a nice complement to the Roland synths I own. There is a little patchbay that lets you route noise into the mixer or use it to modulate things, reverse the envelope polarity and so on, pretty useless really, but when you get hold of a modular synth it comes into its own, because you can use external LFOs and envelopes to control all sorts of features on the synth, mix in an oscillator from the modular but run it through the MS10 filter, FM the oscillator with another one, and so on. In a modular setting the MS10 really comes into its own.
EXAMPLE SOUNDS
All these sounds are MS10 with extra equipment as described.
MS1001 - K2000 playing a loop made entirely of samples from the MS10.
MS1002 - Heavy synth percussion with filter sweep.
MS1003 - MS10 bass over TR-808 samples from the K2000.
MS1004 - MS10 bass with filter being modulated by note velocity and pulse width modulated with white noise, K2000 plays TR-808 samples in the background.
MS1005 - This unusual LFO waveform is created by pluggina patch lead between the LFO triangle wave and square wave outputs.
MS1006 - PWM lead through some delay.
MS1007 - MS10 acid-type patch with TR-808 samples from the K2000 again.
MS1008 - Percussive square wave sound melody followed by PWM example.
MS1009 - Modulated hihat sound.
MS1010 - Reverbed oscillator FM using output from SH-101.
MS1011 - Inverted envelope controls the filter cutoff.
MS1012 - MKS-80 oscillators through the MS-10 filter with some LFO modulation.
LINKS
MS10 at Sonic State here
MS10 at Synth Museum here
MS10 at Harmony Central here
MS10 at Keyboard Museum here
MS10 at Vintage Synth Explorer here
MS10 manual in HTML format here
Sound On Sound retro review here
Nice MS10 photos and samples here