Features include: * preset stretch tables for various pianos which can be recalled, copied, edited, and stored. The stretch tuning feature allows the user to store note offsets for 12 chromatic pitches in each of eight octaves. There are also octave increment and decrement buttons that can be controlled remotely by an optional dual footswitch and/or you can use an optional single footswitch and have note or octave increment. PRESET TEMPERAMENTS IN THE PETERSON AUTOSTROBETM 490-ST * EQUAL * PYTHAGOREAN * JUST INTONATION-MAJOR * JUST INTONATION-MINOR * QUARTER COMMA MEAN-TONE * WERCKMEISTER-III * KIRNBERGER-III * YOUNG * KELLNER * POWER 5THs PRESET STRETCH TABLES IN THE PETERSON AUTOSTROBETM 490-ST * FOR VERTICAL PIANOS SPINET - 39inch and smaller * CONSOLE - 39inch to 51inch * UPRIGHT - 51inch and larger * GENERIC VERTICAL - Average of vertical sizes * FOR GRAND PIANOS SMALL - 5'10inch and smaller * STUDIO - 6' to 7'11inch * CONCERT - 8' and larger AVERAGE - This table is an average of optimal settings over many styles and makes of upright and grand pianos. Some very good information: