The demodulated signal is then decoded with a microcontroller. The audio subcarrier is further demodulated to provide a raw audio signal. Next, the chrominance is demodulated to produce color difference video data. This signal can be demodulated to derive the velocity vs. time of the vibrating target. It also produces a demodulated and bit-synchronized data stream from X-band signals. So the FM sound carrier is then demodulated, amplified, and used to drive a loudspeaker. The tuning is adjusted until the demodulated voice is intelligible. BPSK is used on both carriers and they can be independently demodulated.