At DatasetLoader, convolve question

[wngh1187]

def gen_echo(ref, rir, filterGain):

rir     = numpy.multiply(rir, pow(10, 0.1 * filterGain))    
echo    = signal.convolve(ref, rir, mode='full')[:len(ref)]   

return echo

in this function, rir data type is float32, but ref data type is int16.

can convolve the different data type data?

Is there any problem in terms of signal processing?