Opus is my format of choice for encoding music that I put on my phone. I encode at 160kbit/s and they sound as good as FLAC on my NuraTrue Pros. I don't consider myself an audiophile though, so YMMV.
That's what I do for all my music. I go from FLAC to Opus, store it both a NAS and on the phone, and I get the same quality with a very small size for the files.
Also Opus 160 kbps and more is supposedly an "archival" mode where you cannot hear the difference. It could be my last audio format till the end of time.
i was on mp3 of 190 & 320 kbps but then OPUS didn't exist when i started converting my CDs or downloading mp3 🤷
Sounds like you have a nice project ahead of you to rerip all your CDs to FLAC, and then convert to Opus for your devices.
I did that a few years ago, I recommend dB Poweramp to do the ripping and converting.
to share interesting articles from Wikipedia
Please cite a passage from the article and don't just post a link
also, please do post links and not text or images
and finally , "getting rid of the m. from the URL would also be good"