Hitachi VT-FX6407AS - Manual (Page 49)

RECORDING A PROGRAM -RECORDING TIPS - 49 -
How to set the SAP option.
1 Press the GUIDE button.
2 Press the cursor button to select the SETUP option, and then press the ENTER button.
3 Press the cursor button to select AUDIO, and then press the ENTER button.
4 Press the and cursor button to set the STEREO/MONO option to "STEREO".