Extended Tetrazzi String Trigger

Published on Aug 20, 2013 NakagawaGakki·48 videos

"Here is the first test for using my Extended Tetrazzi to control a stringed instrument.
Each of the wooden barres of the Tetrazzi is patched to a single decade counter and then onto a single 12stage ripple counter.
One gate is chosen from these counters and sent via a banana patch cord to a CGS type Gate to Trigger circuit. This 9VDC trigger is then sent to a small motor with a silicon plectrum that strikes the string when the barre is pressed.
All the while the crazy Tetrazzi is still functioning as its (un)usual self.
In this video Im mostly using the gates from the 12stage ripple counters. Fast, rapid rate pulses are achieved when patched from around 1-5 oclock. More sporadic pulses are given from 7-11oclock. The strings are "prepared" here with springs and various objects.
Its really fun to play and I will build a more permanent type of setup so I can just use the Tetrazzi straight into the stringed instrument, less cables, mess and confusion.
It perhaps doesnt appear to be so in this video, but its very gestural and intuitive, I have found it to throw out some great little sequences all its own.
Sorry for the sound quality, the levels are way out, I hastily recorded this as just a document of the process. Its much better now and will put up more video of it soon."