Re: streaming sound quality
Spotify premium has up to 320 kbps quality available (the highest quality .mp3 audio file). It’s quite good when I connect my phone to a stereo sound system.
I did a comparison test using good headphones about 25 years ago (when file size was more significant due to the high cost of storage media) — CD quality versus 320kbps mp3.
I was surprised that the 320kbps was similar to CD quality (by my ears). I could hear differences on some sounds like the sizzle of a cymbal on a jazz recording or for classical music, but for rock or pop music I decided 320 mp3s would be more than adequate.
I prefer flak.