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==Intro==
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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, [[NoiseHack|Noisebridge was honored to host]] a talk and demonstration by Stanley Lunetta himself.
 
[[File:Stanley3.jpg|400px]][[File:Stanley2.jpg|465px]]
 
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.
 
[[File:Schmitt-osc1.gif]]
 
[[File:Schmitt.gif]]
 
=== 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.
 
[[File:7414-oscillator-waveform-diagram.png]]
 
==== 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:''
[[User:Johnyradio|Johnyradio]] ([[User talk:Johnyradio|talk]]) 11:46, 20 May 2018 (UTC)

Revision as of 04:49, 20 May 2018

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