With 'typically' you are right, but we are here in a Jethro Tull thread and Jethro Tull are known for music and not for movies.There's a reason I use the word 'typically'. Also the word 'disc'.
I don't understand your objection with 'disc'. All my statements relate to discs.
So why did you wrote lossy or lossless?... there was no lossless audio compression standard when DVD-V was invented.
Sorry, but this is not true: You can easily transfer 2 channels of 48 kHz PCM, which is not Redbook standard, via S/PDIF. You can also transfer 24 bit, which is again not Redbook standard (16 bit).... S/PDIF interface, which is bandwidth-limited to 2 channels of Redbook PCM.
You could store approximately 80 minutes of 6 channel uncompressed 96 kHz/24-bit PCM on a single sided DVD-Audio. Hence typically there is no compression needed.... But typically DVD-As contained other content too, and the lossless audio was expected to be 'high rez' (> 44kHz/16bit), leading to space constraints. Hence compression.
What is MLPCM? Do you mean PPCM?... DVD-As offering multichannel LPCM rather than MLPCM exist, but are rare.