def encode(binary_data):
'''
Encode binary data using Bell-202 AFSK
Expects a bitarray.bitarray() object of binary data as its argument.
Returns a generator of sound samples suitable for use with the
audiogen module.
'''
framed_data = frame(binary_data)
# set volume to 1/2, preceed packet with 1/20 s silence to allow for startup glitches
for sample in itertools.chain(
audiogen.silence(1.05),
multiply(modulate(framed_data), constant(0.5)),
audiogen.silence(1.05),
):
yield sample
def encode(binary_data): ''' Encode binary data using Bell-202 AFSK Expects a bitarray.bitarray() object of binary data as its argument. Returns a generator of sound samples suitable for use with the audiogen module. ''' framed_data = frame(binary_data) # set volume to 1/2, preceed packet with 1/20 s silence to allow for startup glitches for sample in itertools.chain( audiogen.silence(1.05), multiply(modulate(framed_data), constant(0.5)), audiogen.silence(1.05), ): yield sample