Just got my Tascam model 12. Recorded 3 tracks then mixed down. Swapped track 11/12 to 9/10. When I played it here nothing. Same when I do a stereo export. I load the .wav on SD play on the mixer and hear nothing. I open the files on my pc and see that the file was written and contains data. I open it on my daw and see the recorded mix but there’s no sound on it. Note that I can here all the tracks when mixing down.