Apple Music plays low. All other apps or streaming is normal.
When playing streamed or downloaded music through Apple Music, the sound was very low compared to any other online streaming or application (Amazon Music, Spotify, Youtube). This is both through internal MacBook speakers or through speakers wired from headphone output. Sound check NOT selected but selecting or deselecting did not change. I tried EVERY setting in music to no avail. I also turned every volume output of each individual song up. I just recently opened the Miniplayer Window and selected the Volume Icon. That was set at the lowest setting. Changing it to higher fixed the issue.
MacBook Pro 16"2019 iOS Ventura 13.1