Lunetta Synthesis
Intro
A page dedicated to Lunetta Synthesis, the art of repurposing and perverting digital logic semiconductor chips into sound-producing devices. The techniques of Lunetta Synthesis were pioneered by sculptor and percussionist Stanley Lunetta in the 1970's.
In 2014, Noisebridge was honored to host a talk and demonstration by Stanley Lunetta himself.
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https://www.noisebridge.net/wiki/NoiseHack
This page is a work-in-progress. Feel free to add more info and links, but please try to keep it organized.
General Tips
- For visual fun, use LED's wherever a schematic calls for diodes.
- For light-activated control, substitute photoresistors for resistors. Or, use a mercury switch like Stanley did in his gun-shaped device, in the photo above :)
Lunetta Oscillator
The Lunetta Oscillator is the heart of Lunetta Synthesis. It's an oscillator based on a Schmitt Inverter.
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Parts
CD40106 Hex Schmitt.
- 6 oscillators on a single chip!
- Wide voltage supply (3V-15V), so you can drive with various batteries.
- http://live.partlist.org/331/image/item/open/root/format=big
Variations and Tips
Intermodulation
Drive one Schmitt oscillator with another, through a diode, and using a switch as a trigger:
https://hackadaycom.files.wordpress.com/2015/01/40106_sync_osc.png?w=800&h=326
Gentle Sounds
Most Lunetta syntesizers out there are raucous and chaotic. But sweet, gentle sounds are also possible.
- Tap the inverter output to obtain a loud, buzzy, digital square wave.
- Tap the inverter input to obtain a gentle, soft, analog triangular-ish wave. That's the voltage presented by the capacitor as it charges/discharges.
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Starvation
Starve or overdrive the power supply to the chip for unexpected results.
Amplification
Use a cheap 3W PAM8403 amplifier module to drive a speaker.
- Make use of the PAM's stereo channels.
- Overdrive the power supply of the PAM with a 9V battery for extra volume (but check the PAM chip for heat).
- https://www.ebay.com/itm/162965060047
General Lunetta Synthesis Links
- https://strangenessandcharm.wordpress.com/2013/10/29/diy-weird-sound-synthesis-with-cmos/
- http://electro-music.com/forum/forum-160.html
- https://hackaday.com/2015/02/04/logic-noise-sweet-sweet-oscillator-sounds/
Page created by:
Johnyradio (talk) 12:49, 19 May 2018 (UTC)