Hi (again), > http//www.uniquepianos.com/ Thanks for the link, Joe. Sauter itself is at http//www.sauter-pianos.de/ It is interesting that they produce a grand optimized for prepared strings and extended playing. Carrillo's instruments baffle me; their keyboards might allow standard notation for the keys to be pushed but would be far from the actual pitches. His '13th tone' is a notion of 12-tone Plus Microtones, so the instruments he had constructed all are supposed to be in ET's divisible by 12. This is 8 times for 96 (and so would need eight separate pages to tune it electronically), instead of semi-tones its smallest intervals are 16th tones; cents-wise, so-called Silberman's 1/6-scMT is closer to 55tET. I've read that this instrument has a single octave compass. The original now resides in the Musée de la Musique in Paris. Clark
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