There used to be this thing where I was small when you would go to Barnes and Noble, and sit on a tiny stool, and there would be a touchscreen, and a pair of big headphones. You would put on the headphones, sit on the stool, and browse the catalog of CDs. Once you found an album, artist or song, it would play a 30 second snippet. You could do this for every song on the album for 30 seconds.
Someone would carefully snip a sound file for each song for sale, ensuring the 30 second snippet was representative of the track. Not just the beginning, not always the chorus, but the most iconic part of the song - possibly to help people who were literally browsing with their ears, trying to find something they’d heard on the radio. Or possibly because that was the most marketable way to sell songs. I remember them doing a good job - they would try not to cut off in the middle of lyrics, and so on. It struck me that it would be a cool job to have, being the person who snipped the songs.
Then you could buy the CD. I think you could possibly also bring a CD to the screen and beep it, to make it play.
There would usually be some dreadful man in his twenties listening too hard at the screen, and if you were a small child, your duty would be to go and stare at him contemptuously until he moved. Then he would do the same to you. You would hate each other coldly and without speaking. In those days it would not be worth making a forum post about it, but that was the level of hate that you would both have in your heart. He would always win anyway, because he was not there with his mom.
In this way, albums were found. It was not easy.