<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def read_blocks(self, block_size=4096):
 """Generates buffers containing PCM data for the audio file. """

        while True:
            out = self.mf.read(block_size)
            if not out:
                break
            yield bytes(out)