Turbo Everdrives are hit and miss when it comes to playing .hes files. They often distort sounds, miss entire channels, change the speed, etc and many don't work at all. Different revisions have different results for the same files and there is no consistency for newer or older models being better or worse. Sometimes an old TED will play a particular soundtrack better but it will play another soubdtrack worse.
Also, some soundtracks will only work on a particular TED if you rename them to .pce