BD-ROM players are required to support Dolby Digital, DTS and linear PCM. They may optionally support the others.

There are two formats for audio files: PCM and DTS. The difference between the two has to do with how the data is stored.

Linear PCM (LPCM) – up to 8 channels of uncompressed audio, standard format used in
computers, older electronic music keyboards, some CDs audio
DTS is a predecessor of the DVD audio.

PCM format
DOLBY Digital (DD) – format used for DVDs, 5.1-channel surround sound
Dolby Digital Plus – 7.1-channel surround sound
Dolby TrueHD – lossless encoding of up to 8 channels of audio

DTS format
DTS – 5.1-channel surround sound
DTS-HD High Resolution Audio – 7.1-channel surround sound
DTS-HD Master Audio – lossless encoding of up to 8 channels of audio

HDMI (digital) – up to 8 channels of digital audio