##########################################################################
# Compute and print piano key frequency table
##########################################################################
from __future__ import division
pitchhz, keynum = {}, {}
keys_s = ("a", "a#", "b", "c", "c#", "d", "d#", "e", "f", "f#", "g", "g#")
keys_f = ("a", "bb", "b", "c", "db", "d", "eb", "e", "f", "gb", "g", "ab")
keys_e = ("a", "bb", "cb", "b#", "db", "d", "eb", "fb", "e#", "gb", "g", "ab")
[docs]def getfreq(pr=False):
if pr:
print("Piano key frequencies (for equal temperament):")
print("Key number\tScientific name\tFrequency (Hz)")
for k in range(88):
freq = 27.5 * 2.0 ** (k / 12.0)
oct = (k + 9) // 12
note = "%s%u" % (keys_s[k % 12], oct)
if pr:
print("%10u\t%15s\t%14.2f" % (k + 1, note.upper(), freq))
pitchhz[note] = freq
keynum[note] = k
note = "%s%u" % (keys_f[k % 12], oct)
pitchhz[note] = freq
keynum[note] = k
note = "%s%u" % (keys_e[k % 12], oct)
pitchhz[note] = freq
keynum[note] = k
return pitchhz, keynum
# construct filnames for Salamander piano samples
sampfn = {}
facs = 1, 2 ** (1 / 12), 2 ** (2 / 12)
nam = "A", "C", "D#", "F#"
[docs]def getfn(layer):
for k in range(88):
oct = (k + 9) // 12
sampfn[k] = "%s%uv%u.wav" % (nam[(k // 3) % 4], oct, layer), facs[k % 3]
return sampfn
# x = getfn()
# for a in x:
# print(a, x[a])
if __name__ == "__main__":
pass
