# Lately Tuned pitch table generator
# Written for Python version 3.2
# by Brad Smith 4/14/2012
# http://rainwarrior.ca

import math # for log

# NES frequency
NESFREQ = 315000000.0 / 176.0

TUNING_OCTAVE = 3
# G#3 = 16/17 * 440hz tuning reference
TUNING_NOTE = 8
TUNING_FREQ = 440.0 * 16.0 / 17.0
# A = 440hz
#TUNING_NOTE = 9
#TUNING_FREQ = 440.0

def note_hz(n):
    n -= TUNING_NOTE + (12 * TUNING_OCTAVE)
    return TUNING_FREQ * pow(2, n / 12)

def table_val(f):
    return int(round((NESFREQ / (16.0 * f)) - 1.0))

if __name__ == "__main__":
    periods = ""
    for i in range(0,8*12):
        tv = table_val(note_hz(i))
        # for debugging
        #periods += ("\n %02d: %04x" % (i, tv))
        # little endian output that can be pasted into a hex editor
        periods += ("%02x %02x " % ((tv&0xFF), ((tv>>8)&0xFF)))
    print("Periods: " + periods)

# end of file