Audacity Forum

Thanks, that gives me plenty of info to go with and my original question appears to be answered too!
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That it shouldn't have ever worked is pretty much my feeling too after trying to troubleshoot, however, it did appear to. I do have windows set to show file extensions and the problem children are MP4a, however your reply was a big clue. I'm importing audio from an ion USB turntable, the ion EZ Viny...

I appear to have the same problem. I'm importing iPod files, that's all I've ever used Audacity for. When importing it does no "importing mp3" conversion. This only started today, if I go back and load "recently loaded" files it imports, converts and exports normally. Note these ...