buffer0[k] = Ga0 * input_tuple[0] + Gb0 * (output_value1 - input_tuple[1])
buffer1[m] = Ga1 * input_tuple[1] + Gb1 * (output_value0 - input_tuple[0])
# Increment buffer index
k = k + 1
if k == buffer_length0:
# We have reached the end of the buffer. Circle back to front.
k = 0
m = m + 1
if m == buffer_length1:
# We have reached the end of the buffer. Circle back to front.
m= 0
# Clip output value to 16 bits and convert to binary string
output_value0 = clip16(output_value0)
output_value1 = clip16(output_value1)
output_string = struct.pack('hh', output_value0, output_value1)
# Write output value to audio stream
stream.write(output_string)
# Get next frame (sample)
input_string = wf.readframes(1)
while echoleft != 0 and (counter0 > 0 or counter1 > 0) :
output_value0 = Gc0 * buffer0[k]
output_value1 = Gc1 * buffer1[m]
buffer0[k] = Gb0 * output_value1
# Update buffer
buffer[k] = input_value + Gfb * buffer[k]
# Update buffer indices
k = k + 1
m1 = m1 + 1
#m2 = m2 + 1
if k == buffer_length:
k = 0
if m1 >= buffer_length:
m1 = 0
# if m2 >= buffer_length:
# m2 = 0
# Clip output value and convert to binary string
output_string = struct.pack('h', clip16(output_value))
# Write output value to audio stream
stream.write(output_string)
# Get next frame (sample)
input_string = wf.readframes(1)
while echoleft != 0:
# Compute output value
output_value = g1 * buffer[m1] + g2 * buffer[k];
# Update buffer
buffer[k] = Gfb * buffer[k]
# Update buffer indices
rate = Fs,
input = False,
output = True )
input_string = wf.readframes(1) # Get first frame
if num_channels == 1:
while input_string != '':
if bitformat == 16:
# Convert string to number
input_tuple = struct.unpack('h', input_string) # One-element tuple
input_value = input_tuple[0] # Number
# Compute output value
output_value = clipping.clip16(gain * input_value) # Number
# Convert output value to binary string
output_string = struct.pack('h', output_value)
elif bitformat == 32:
input_tuple = struct.unpack('f', input_string) # One-element tuple
input_value = input_tuple[0] # Number
output_value = clipping.clip32(gain * input_value) # Number
output_string = struct.pack('f', output_value) # Convert output value to binary string
# Write output value to audio stream
stream.write(output_string)
# Get next frame
input_string = wf.readframes(1)
elif num_channels == 2:
rate=Fs,
input=False,
output=True)
input_string = wf.readframes(1) # Get first frame
if num_channels == 1:
while input_string != '':
if bitformat == 16:
# Convert string to number
input_tuple = struct.unpack('h', input_string) # One-element tuple
input_value = input_tuple[0] # Number
# Compute output value
output_value = clipping.clip16(gain * input_value) # Number
# Convert output value to binary string
output_string = struct.pack('h', output_value)
elif bitformat == 32:
input_tuple = struct.unpack('f', input_string) # One-element tuple
input_value = input_tuple[0] # Number
output_value = clipping.clip32(gain * input_value) # Number
output_string = struct.pack(
'f', output_value) # Convert output value to binary string
# Write output value to audio stream
stream.write(output_string)
# Get next frame
input_string = wf.readframes(1)