The MOST bus is very particular in what it accepts, so your 24/48 flacs have got to be at zero compression for the car to play them. The conversion is a snap with foobar, which is free. Just open up the files you have, be they wav, flac, 24/96. 16/44, whatever, and set up and save conversion setting to end up with 24/48 flac at zero compression.Just bought a ‘21 TLX A-Spec. I brought a USB with Money converted from DVD by DVD Audio Extractor to WAV to confirm discrete 5.1 playback. The coins moved around! It worked and I loved the car’s looks and ride, so I opened up the wallet. The sound overall is impressive and big. I would say more immersive than my home set up due to the number of speakers and close range. FLAC files were variable - Atom Heart Mother, Echoes worked. No go on Sgt. Pepper’s, Division Bell. These were my first conversions to USB. Used 24 bit/48kHz. 32 GB San Disk Cruiser USB. DAE didn’t have uncompressed option for FLAC but files seemed similar size to WAV ~2GB per album. Wonder if I’m doing something wrong. When converting does it make any difference conversion from DTS vs AAC? Still experimenting with naming files so the tracks play in order rather than alphabetically. Any questions or comments are welcome.
The output that you get will play in the car, be it 4.0, 4.1, or 5.1. The only other thing you may have to deal with is the number of channels. If you have quad or 4.1 stuff, it needs to be in a 5.1 file, so the center and lfe channels will have to be empty and present if they are not there.
It's a pain for sure, but once you get it down you won't even think about it