def overlay(filename1, filename2):
""" overlay creates a sound that overlays the two given sound files
input: filename, the name of the original file
output: no return value, but
this creates the sound file 'out.wav'
and plays it
"""
print "Playing the original sound..."
play(filename1)
play(filename2)
print "Reading in the sound data..."
samps1, sr1 = readwav(filename1)
samps2, sr2 = readwav(filename2)
print "Computing new sound..."
newsamps = add_scale_2(samps1, samps2, 0.5, 0.5)
newsr = (sr1+sr2)/2 # no change to the sr
writewav( newsamps, newsr, "out.wav" )
print "Playing new sound..."
play( 'out.wav' )
def changeSpeed(filename, newsr):
""" changeSpeed allows the user to change an audio file's speed
input: filename, the name of the original file
newsr, the *new* sampling rate in samples per second
output: no return value; creates and plays the file 'out.wav'
"""
samps, sr = readwav(filename)
print "The first 10 sound-pressure samples are\n", samps[:10]
print "The original number of samples per second is", sr
newsamps = samps # no change to the sound
writewav( newsamps, newsr, "out.wav" ) # write data to out.wav
print "\nPlaying new sound..."
play( 'out.wav' ) # play the new file, 'out.wav'
def static(filename, probability_of_static):
""" static introduces random bits of static based on the probability given
input: filename, the name of the original file
output: no return value, but
this creates the sound file 'out.wav'
and plays it
"""
print "Playing the original sound..."
play(filename)
print "Reading in the sound data..."
samps, sr = readwav(filename)
print "Computing new sound..."
newsamps = replace_some(samps, probability_of_static)
newsr = sr # no change to the sr
writewav( newsamps, newsr, "out.wav" )
print "Playing new sound..."
play( 'out.wav' )
def volume(filename, scale_factor):
""" volume increases the volume by the floating-point value scale_value
input: filename, the name of the original file
output: no return value, but
this creates the sound file 'out.wav'
and plays it
"""
print "Playing the original sound..."
play(filename)
print "Reading in the sound data..."
samps, sr = readwav(filename)
print "Computing new sound..."
newsamps = [x * scale_factor for x in samps]
newsr = sr # no change to the sr
writewav( newsamps, newsr, "out.wav" )
print "Playing new sound..."
play( 'out.wav' )
def reverse(filename):
""" reverse reverses the original file
input: filename, the name of the original file
output: no return value, but
this creates the sound file 'out.wav'
and plays it
"""
print "Playing the original sound..."
play(filename)
print "Reading in the sound data..."
samps, sr = readwav(filename)
print "Computing new sound..."
newsamps = samps[::-1] # reverse
newsr = sr # no change to the sr
writewav( newsamps, newsr, "out.wav" )
print "Playing new sound..."
play( 'out.wav' )
def flipflop(filename):
""" flipflop swaps the halves of an audio file
input: filename, the name of the original file
output: no return value, but
this creates the sound file 'out.wav'
and plays it
"""
print "Playing the original sound..."
play(filename)
print "Reading in the sound data..."
samps, sr = readwav(filename)
print "Computing new sound..."
# this gets the midpoint and calls it x
x = len(samps)/2
newsamps = samps[x:] + samps[:x] # flip flop
newsr = sr # no change to the sr
writewav( newsamps, newsr, "out.wav" )
print "Playing new sound..."
play( 'out.wav' )
def echo(filename, time_delay):
""" echo takes in a filename and overlays the same sound on itself, shifted by time_delay
input: filename, the name of the original file
output: no return value, but
this creates the sound file 'out.wav'
and plays it
"""
print "Playing the original sound..."
play(filename)
print "Reading in the sound data..."
samps, sr = readwav(filename)
print "Computing new sound..."
echosamps = [0]*(time_delay*float(sr)) + samps
echosamps = echosamps[:len(samps)]
newsamps = [echosamps[i]+samps[i] for i in xrange(len(samps))]
newsr = sr # no change to the sr
writewav( newsamps, newsr, "out.wav" )
print "Playing new sound..."
play( 'out.wav' )
def __init__(self, filename):
self.samps, self.sr = readwav(filename)
return
def __init__( self, filename = None):
if filename:
self.samps, self.sr = readwav(filename)
else:
self.samps, self.sr = None, None
def load(filename):
samps, sr = readwav(filename)
return (samps, sr)
def overlay(filename1, filename2):
'''overlays the sounds from two files and plays them'''
sounds = [readwav(filename1), readwav(filename2)]
newSound = overlayN(sounds)
playNewSound(newSound)
