If you’ve been to a record store recently, you may have noticed more cassettes popping up- well go ahead and grab some and dust off the ol’ walkman  because audio cassettes are making a comeback! More than 100-thousand cassette tapes were sold in the US last year and 120-thousand in Britain – that’s the most since 2003 (before most of us had an MP3 player). Pop artists like Lady Gaga, Selena Gomez and Dua Lipa released albums on tape, helping make cassettes relevant again.