Extended Tetrazzi Test

Published on May 17, 2013 NakagawaGakki·43 videos

"Here are some excerpts from my first test with the Extended Tetrazzi I have built. I spent about an hour exploring it right after I first turned it on this afternoon, sooo much fun.
The Tetrazzi PCB was ordered from Super instrument designer Peter Blasser at Ciat Lonbarde - http://www.ciat-lonbarde.net/tetrazzi/ Its sadly discontinued now, but the Tetrax is now available.
I want to take this basic design and extend it to become a more expressive and per formative instrument in my setup. I took some inspiration from the way the Tetrax is laid out.
I started by making the wooden play Barres longer to create more flex, a kind of "Differential Lever". This basically means that pressing down (and pulling up!) on either side of the fulcrum will produce different results. This modification alone has added a lot more subtle expression to the Tetrazzi.
I have brought all the SQT and TRN points for each internal Oscillator out to a metal (banana) jack that doubles the function. I can use the socket as a touch point to "bend" with my fingers but also temporarily hard wire these connections to retain a patch. Also these Banana jack are standard on Modular Synthesizers so I hope to be able to interface this with my modular in the future.
There are still 3rows of jacks that are unused ATM, I hope to further modify this instrument to add even more playability. There are many ideas at http://pugix.com/synth/modular-tetrazzi/ who has completely opened up the Tetrazzi and converted it into a fully blown Modular Panel.
Although I wont go this far I hope to glean some valuable info from his site.

The case of my Extended Tetrazzi has been designed and cut by me in the CAD/CAM environment using a CNC machine. The Barres have been especially carved down (on the underside) in such a way that they flex right over the hidden piezo sensors.
All wood is reclaimed Jarrah floorboards from a house that was being demolished nearby my workshop."