Sony DCR-TRV75 Operating Instructions Manual page 94

Audio dubbing
You cannot audio dubbing in the following cases:
•The tape recorded in the 16-bit mode
•The tape recorded in the LP mode
•Connecting with the DV Interface
•The blank portions of the tape
•The cassette set the write-protect tab to lock
To add new sound more precisely
Press ZERO SET MEMORY at the point where you want to stop recording later during
playback.
Follow the step 2 in "Using the touch panel." Recording automatically stops at the point
where ZERO SET MEMORY was pressed.
We recommend that you add new sound on the tape recorded with your
camcorder
If you add new sound on the tape recorded with another camcorder (including other
DCR-TRV75/TRV80), the sound quality may become worse.
Monitoring the new recorded sound
The POWER switch should be set to
Operate by touching the panel.
(1) Play back the tape on which you added audio.
(2) Press FN to display PAGE1.
(3) Press MENU to display the menu.
(4) Select AUDIO MIX in
(5) Press r/R to adjust the balance between the original sound (ST1) and the new
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sound (ST2), then press EXEC.
About five minutes after you disconnect the power source or remove the
battery pack, the setting of AUDIO MIX returns to the original sound (ST1)
only. The default setting is original sound only.
.
, then press EXEC (p. 175).
EXIT
VCR SET
H i F i SOUND
AUD I O M I X
A/VcDV OUT ST1 ST2
r R
EXEC RET.