If you’re using a mono mic, only the L (left) channel will be recorded. Check whether the mic is stereo or mono. In order to record onto both channels using a mono mic, set the external mic type to “MONO”:
- Press MENU.
- Cursor to "Input" and then press the red record button.
- Cursor to EXT Mic and set this to MONO.
- Press MENU twice to return to the main screen.