In case it wasn't obvious, I'm an engineer, and I can't help myself from trying to understand how it works. So it's good to know there are different masters, but I still want to know if I can use always use streaming, or whether I can expect to have it be poor part of the time. Why would they use a poor quality master and Spotify wouldn't? On both services, I chose the song off what looks like the original album, no 'remastered' in name for example, or a 'best-of' album. I'm not really interested in $10/month for getting poor results part of the time. Stuff that only works part time makes me bonkers. The reason to use this specific song is it's an existence proof of a broken track, which dramatically lowers the value of Tidal for me.
It's a tricky combo though to decide what matters most. Part of the entire point is the convenience, so Spotify is the clear winner there. But then that'll be $20/month with both services. It's not going to break the bank, so maybe that's the right choice. However, if I manage all the files myself, I can get lossless for free, but then have no search ability. No clear winner so far, was rather hoping Tidal would be a slam dunk.
However, Tidal is looking less like a winner to me. I spent some time digging around in the UI, and I think there is a limit on the number of songs that you can download. It's on the order of about 500 songs. Might be space related instead. If average lossless/download songs are 10Mb/min and 2 minutes long, that's on the order of 10G of storage.
I let the car sit on WiFi with Sentry Mode on so it wouldn't sleep, and let it download all the queued items. It stalled out, and lists of songs were marked in light grey which seems to mean unplayable. If I deleted some downloaded songs, it picked up some new ones. I'm pretty sure there is some hard-coded limit that is on the low side for me.
I updated to latest Tesla firmware, 2021.44.6 to hopefully get some clarity into bugs and how it works. I also rebooted to see if that helped. No difference. One strange thing is I no longer see the Telsa T at reboots.
The reason some HiFi songs start playing and then glitch out and show Loading Error, seems to be related to this hard storage cap. It only has space for part of a new song, so when I tap a song to play, it downloads all it can, and stops.
500 songs is OK, but I don't think that is going to cut it for using it minus streaming, and if I can't trust streaming to be good, then there is no real value added to me. I don't really understand such a low cap. I'm expecting it to be 10x bigger, 5000 songs and then we can talk.
@Zacster: I think this is the encoder working badly on this song. I need to try a better A:B:A test when I'm fresh, but I did a test case where I listened to it streaming and the kick drum at the start is all thumpy and bad. Then I enabled WiFi and let it download the song so it was HiFi, and that version sounded a lot better, including clearing up the highs/vocals.