Thanks!
Apparently Windows should support this now
https://support.microsoft.com/en-us/help/316992/file-types-supported-by-windows-media-player

After trying this, I see the same issue. M4a format, though showing in the list, and appearing to be valid, fails when importing/opening .. same QT message ..


I do not work here, but the benefits are still awesome
Make your sound your own!