Difference between revisions of "Noisebridge:Lunetta"

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Most Lunetta syntesizers out there are raucous and chaotic. But sweet, gentle sounds are also possible.  
 
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 '''output''' to obtain a loud, buzzy, digital square wave.
* Tap the inverter input to obtain a gentle, soft, analog triangular wave. That's the voltage presented by the capacitor as it charges/discharges.
+
* Tap the inverter '''input''' to obtain a gentle, soft, analog triangular wave. That's the voltage presented by the capacitor as it charges/discharges.
  
 
[[File:7414-oscillator-waveform-diagram.png]]
 
[[File:7414-oscillator-waveform-diagram.png]]

Revision as of 13:41, 19 May 2018

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.

Stanley3.jpgStanley2.jpg

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.

Schmitt-osc1.gif

Schmitt.gif

Parts

CD40106 Hex Schmitt. 6 oscillators on a single chip! 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 wave. That's the voltage presented by the capacitor as it charges/discharges.

7414-oscillator-waveform-diagram.png

Starvation

Starve or overdrive the power supply to the chip for unexpected results.

Amplification

Use a cheap 3W PAM amplifier module to drive a speaker. Overdrive the powersupply of the PAM with a 9V battery for extra volume (but check for heat).

General Lunetta Synthesis Links


Page created by: Johnyradio (talk) 12:49, 19 May 2018 (UTC)