There is a BT cassette adapter, believe it or not. Tried it an old Audi we had that still had a deck in it. It worked but the charging cable couldn’t stay plugg

There is a BT cassette adapter, believe it or not. Tried it an old Audi we had that still had a deck in it. It worked but the charging cable couldn’t stay plugged in while cassette was loaded, and if you left it in car in cold temps of course battery would turn to rubbish pretty quickly. However, it’s awesome that this exist[s/ed]. I thought there must be a way for some bright engineer to get the thing to gen power from the rotation of the tape reels and just dump the need to charge as often or at all.