I know most music is never produced in 5.1 or 7.1, but I know with Blu-rays, most soundtracks from large film companies are surround sound. Obviously I can listen to 5.1 while the movie is playing, but after the surround sound music is produced, is there any place it ends up besides the film? Are there 5.1 soundtracks produced?
Albums (both movie soundtracks and albums of music that are not movie soundtracks) have been released in 5.1 format on physical media on SACDs. These never caught on with the public, but they exist. To play back an SACD, you need a special CD player. Audio on SACDs could be in 2-channel stereo or 5.1-surround sound or both. For the latter, you would of course need a home audio system with amplifiers and speakers that can reproduce 5.1-surround sound.
Music mixed for SACDs was on the market from about the year 2000 to about the year 2009. There have been little or no releases since that time, because the record industry deemed the format to be a failure.
It appears that a number of classic rock albums from the 70s have been remixed into 5.1-surround sound and are available for purchase on audio DVD and audio Blu-ray discs. I'm not sure what kind of audio equipment you would need to play them back, although I have read that some currently-available hardware Blu-ray players can play back 5.1-surround encoded audio from audio DVDs as well as SACDs. I've found examples of albums for sale by Rhino Records, a label that specializes in remastering and re-releasing classic rock albums from the 70s.