Originally Posted by nrdstrm
What is the difference between "TrueHD" and "PCM" in terms of quality?
TrueHD and DTS-HD Master Audio are just lossless compression. For all intents are purposes they are both equal in quality to each other and to PCM. PCM is just raw audio data with no compression. The benefits to TrueHD and DTS-HD MA is that they take up less space on disc.
Now the quality can differ if let's say the TrueHD track is encoded in 96kHz/24-bit compared to a PCM track being endoded at 48kHz/16-Bit or vica-versa. Otherwise all three are equal with no discernable sound difference.