AnnieYazbeck

I have the Hi-Res quality. Before, I usually access Tidal library to get Tidal MQA quality. But the price is high. Thanks to Amazon Music HD, it now costs only $12.99 per month. And I have an Amazon Music HD Downloader, which gives the ability to download and convert Amazon Music to MP3, FLAC, WAV, AAC, M4A, Lossless and M4B. Now, I'm able to play Amazon Music HD songs on my HD devices offline.

You can try to uninstall and install the Spotify or YouTube app on your computer to see whether it works well for you. If not, you can contact Apple support team to ask what happened. If you are urgent, you can use AudFree Spotify Music Converter to download and convert Spotify songs to iPhone' compatible files and try to stream music from it via the Bluetooth.