PCM generally means the player or television has decoded the audio before sending it onward. Bitstream sends an encoded format for another device to decode. Choose a path supported by the whole sound system; neither label is automatically the best option for every setup.
Identify the receiving equipment
Television speakers, a stereo amplifier and a multichannel receiver have different capabilities. A receiver may accept a format that the television cannot pass through, while an older soundbar may need a simpler signal. Read the documentation for each part of the route rather than copying a setting from another household.
Use PCM as a diagnostic comparison
If video plays but a particular audio track is silent, a supported PCM or stereo option can help establish whether encoded-format support is involved. Record the original setting and replay the same passage. A change that restores sound is useful evidence, but it does not prove every surround feature remains available.
Check the complete result
Listen for dialogue, effects and synchronisation, not merely whether any noise comes from the speakers. If a surround setup is expected, verify its actual input information and speaker configuration. Avoid judging the format solely from a television’s volume display, which may show control information rather than the audio being decoded.
