converts from musical notes to sound frequencies and vice versa
USAGE:
python note_freq.py [OPTIONS]
Options:
-n NOTE formatted as LETTER ACCIDENTAL OCTAVE (F#3, Ab7, c4, etc.)
-f FREQUENCY floating point number, frequency to convert to note value
-c TUNING optional integer, tuning in cents (-3 = down 3 cents, etc)
-h TUNING optional integer, tuning in Hertz (5 = up 5 Hertz, etc)