As the designer describes:
The Sidrassi Organ has seven pressure sensitive bars you press to express the seven tones within. Use the buttons on the front to scroll each bar through random tunings. There is a master pitch knob, as well as a master modulation knob. There are 42 nodes, six for each tone. Half the six are inputs- one linear modulation and two polar modulations. The other half are outputs- one square wave and two gestures from the bar. The organ is "normal" when unbraided; it has no special node modulations. You can play seven-note pitch sets to your hearts content, and turn up the modulation to make it more and more nasty. With special node modulations, the instrument reacts more to your touch and you will find more dynamic whirlpools within.
THE BARS RESPOND TO DOWNWARDS PRESSURE AS WELL AS UPWARDS. And these two movements are separated into left and right channels. So the instrument has an echo effect; each note plays out of the left speaker then the right speaker as you press and release. Imagine the complicated panning once you're pressing seven bars!
The Sidrassi is an Organ, designed to reflect the glory of god. But it allows exploration of the Devils' Tone, which is irrational relationships.
THE INSTRUMENT RUNS ON BATTERIES AND WALLWART
Is it possible to set every one note(frequency) of the aluminium pads like intended (per poti) or just randomly (which would mean, I could not reproduce a tuning I have found and would like to use for a live gig). and if not (which is also a fine concept, but I would welcome the possibility to tune every tone manually)???
Each note owns a unique button controlling a unique tank, which is also known as analog storage scroll. So you can set each bar separately. When I play the instrument, I find that I am constantly rediscovering new tunings, and if I don't like a note I scroll through a few random possibilities for that note and then play in the thus mutated tuning. Thereby I feel- although I cannot reproduce a fabled tuning verbatim- I can channel the mood or essence of that raag emotionally and so manifest it orbitally on the random notes.