London Calling Cassette issues! Hoping someone has some advice
Hello everyone, I’m having a huge problem with the album “London Calling” by The Clash on cassette. When playing it in my Walkman model WM-F45, it starts to play just fine but it slowly begins to play slower and sound terrible. I played it on my modern GPO Brooklyn boombox and it plays absolutely fine with no issues. I then played it on my Conion C-100f boombox and it sounded super scratchy. The cassette itself looks like it’s in great condition. This is especially weird to me because I bought the exact same cassette before this and it was having almost the exact same problem this one has where it sounds terrible on 80s stuff but fine on modern stuff. The Walkman and Conion have been professionally cleaned and do not have this problem with any other cassette. Am I just super unlucky or is there something notorious about this album on cassette that I do not know about? If anyone has any advice or better yet a way to fix this problem without actually cracking the cassette open please let me know. Thank you so much