def mul(self, factor):
"""
Convert the channel that has all frames in the original channel are
multiplied by the floating-point value factor.
Samples are truncated in case of overflow.
@param factor (float) the factor to multiply the frames
"""
if factor == 1.:
return
newchannel = Channel()
newchannel.sampwidth = self.sampwidth
newchannel.framerate = self.framerate
a = AudioFrames( self.channel.get_frames(self.channel.get_nframes()), self.channel.get_sampwidth(), 1)
newchannel.set_frames( a.mul(factor) )
self.channel = newchannel
