MATRIXSYNTH: Tuning fork oscillator

Monday, November 19, 2012

Tuning fork oscillator

Published on Nov 19, 2012 by organfairy

"This is not exactly musical. But still there must be some way that it can be used for musical purposes.
Anyway, the tuning fork oscillator was often used in clocks and other places where frequency stability was important before the crystal oscillator became common. I found an old tuning fork that looked like it had been used for this purpose in a second hand or junk sale some years ago. I decided to try and make the driving system for such a device and this is the result.

The idea is that two electro magnets are connected to an amplifier - one to the input, the other to the output - and when they are brought together with a tuning fork in the middle the whole thing will start to oscillate - just as if you put a microphone too close to the speaker in a PA system. But since the tuning fork can only oscillate at one frequency this will determine the oscillation.

The music is something I made a while ago using Yamaha HE-8 and Technics SX-C600 organs, Roland JX-8P synthesizer, and Roland CR-68 analogue drum machine."

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