What does PCM audio mean?
PCM, or pulse-code modulation, represents a sampled audio waveform using discrete values. In playback settings, PCM commonly indicates that audio has been decoded before being sent to the next device.
Why it matters
PCM is not automatically limited to stereo; supported channel counts depend on the connection and equipment. It should be distinguished from an encoded bitstream passed to another decoder. Choosing PCM can be a useful compatibility comparison when a particular encoded track is silent, but the complete result should be checked for channel layout and synchronisation rather than merely the presence of sound.
A practical example
If a soundbar is silent with an unsupported passthrough format, a documented PCM or stereo output may restore playback. Record the original setting and consult the devices’ capabilities before deciding whether that route preserves the surround presentation you intended to use.
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Related terminology: Payment reference, Peak luminance.
For practical setup and troubleshooting, browse the journal or support guides.