Yamaha CMX1 Introduction
The CMX1 / MT1X was a four track recorder designed to use standard chrome CrO2 cassette tapes. To be able to record four tracks, it would combine the standard two tracks (left and right stereo) on side A with the two tracks on side B. Thus the cassette tape is can only be played properly on one side. If you pop it in on the other side, everything will be played in reverse.