40106 noise cheatsheet

The 40106 inverter ic will help you out with a harsh and loud square wave. Here are some sound samples and some schematic-like graphics.

Theremin

Schematic

Actual Mess

Two voices

Schematic

Actual Mess

Six voices

Schematic

Actual Mess

Two voices – Diode mix

Schematic

Actual Mess

Fünfstimmiger Dioden-Mix

What’s what?

Cheers,
Florian

Random Appropriation Synthesizer

Since the late 1990s the European Union is planning to get rid of the analog radio signal. It will be replaced by the DAB (digital audio broadcasting) technology. This will be a great opportunity to use the FM band for creative purposes. The Random Appropriation Synth is a project intending to set an example. The instrument receives fm waves and modulates those short soundbits over a keyboard. There is no audio output. Instead there is an fm transmitter. The modulated sounds can be heard over a radio. The initial concept for the modulation interface was inspired by the casio sk-1 lo-fi sampling keyboard.

An early paper prototype showing the different modules and stages of caption, modulation and output of sound:

paper model ras synthThe FM transmitter turned out to be the trickiest module to build. Continue reading “Random Appropriation Synthesizer”