This is probably irrelevant. The audio is analog (requires DAC to decode into bitstream) and is transmitted with some fixed frequency (44.1kHz or 48kHz), without any particular synchronization.
Nope. If you're trying to recover bits from a signal which is either high or low, and the signal stays high for a long time, unless your clocks are perfect (they won't be) you won't be able to tell just how many bits were in that long period of "high"s.