def midi2freq(midi_number, tuningA4=<NUM_LIT>):
MIDI_A4 = <NUM_LIT><EOL>return tuningA4 * <NUM_LIT:2> ** ((midi_number - MIDI_A4) * (<NUM_LIT:1.> / <NUM_LIT>))<EOL>
Given a MIDI pitch number, returns its frequency in Hz.