song on cassette was recorded backwards

Long story short…I had a boyfriend back in the day who was a great musician,who died.I received a cassette tape that he had recorded ,I just recently burned it to a CD,one song on the CD was recorded backwards and was wondering how I could possibly listen to what that song says.Thanks

So I presume that you also have the song as an audio file.

Import that file into Audacity and apply the “Reverse” effect.

Thanks so Much I will try that.