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This program is lets you calculate the BPM or sample rate required to change the pitch of audio up or down by a number of semitones. It also calculates the BPM or sample rate change required to change the pitch of audio by a specific number of semitones. It's simple, but useful if you perform any tasks that require sample rate or BPM conversion. To calculate the semitone shift from one sample rate or BPM to another, fill in the first two blanks and then click "Calc" next to the Semitone Shift text box. To calculate the sample rate or BPM change to alter audio by a specific number of semitones, fill in the first blank, enter the semitone shift, and then click "Calc" next to the "End Sample Rate/BPM" text box.