http://www.kickstarter.com/projects/706 f=category
4 square wave oscillators passing thru a low-pass filter.
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ChipMusic.org / Forums / General Discussion / Neat Square Wave Kickstarter Project I think you guys might like
http://www.kickstarter.com/projects/706 f=category
4 square wave oscillators passing thru a low-pass filter.
Too bad it's USA only. Seems like a fun weekend DIY for $30.