DIY time: Home made Touch Synthesizer
This handmade synthesizer is played by bridging the contact points. There are 15 contact points, each of which plays a higher pitch. It is monophonic and will sound the highest pitch being played and 2 effect points.
There is controllable LFO that is activated by pressing the far left contact point and is fed to the square-wave oscillator producing quick modulation, or an almost distorted throaty sound. In addition to LFO speed there is a low pass filter and volume control. Also the far right contact point will create some interesting effects, responding well to light touches that can zap the frequency well out of audible range.
The contact strip is sensitive to pressure and even the resistance of a particular player’s skin. For example someone with sweaty hands will produce a higher frequency. Please note with excess sweat on the contact points you will find a slight decay, however it’s quirks are easily learned and tamable.
It has a 1/4″ output and is powered by an included 9volt battery. The copper finish will have an aged look especially after being played a bit.