flickr by Squarenoise(click for more)
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EVERYTHING SYNTH
Knob box for the Yamaha DX7 series.
flickr by zonkoutLecture: Tom Oberheim (Barcelona 2008) from Red Bull Music Academy on Vimeo.
via the Red Bull Music Academy. via JB. Also see this post on Don Buchla.
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All Oscillators range from 16' through 2' pitch and can be tuned using dual concentric vernier tuning pots for precise tuning... and Oscillator 3 can be modulated into low frequency allowing you to gain extra modulation possibilities (and emulate minimoog patches).


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"Although it is not an especially common type of filter, if you have a decent number of softsynths, you may have come across what is called a 'comb filter' (so named, because if you look at its frequency response, it looks like the teeth of a comb). Casual mucking about usually results in flanging type effects, which is all well and good, but why would you need that when your plug-in folder probably already has a dedicated flanging effect or two? While it is true that comb filters can be used for flanging type effects, where it really becomes useful is in doing a sort of basic physical modelling."
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