Boss BR-1200CD Owner's Manual page 69

Recording a new track while listening to an earlier recording (Overdubbing)
7
Move the recorded track's fader to a position
that gives a suitable playback volume, and then
press [PLAY].
[PLAY] will light up and the track just recorded will
play back together with those tracks recorded earlier.
If you turn off the BR-1200CD without saving the current song, the recorded audio will be lost.
Useful tip for overdubbing
When you are making a new recording while listening to previously recorded tracks, these tracks can drown out the
sound of the instrument currently being played, making it difficult to hear. In this type of situation, you can lower the
faders of the playback tracks, use pan to move either these tracks or the instrument being played to the left or right,
etc. to make it easier to hear this instrument.
If you have constructed a song through repeated overdubbing, it is often the case that the recorded instruments will
sound disjointed in terms of volume and position, giving the impression that they're not actually part of the same
performance. Nevertheless, if you combine each of these tracks into a stereo mix while readjusting the balance of
volume and pan settings, you will be able to convey the image of a single, complete song.
For more information and instructions on mixing down, refer to "Mixing audio from various tracks onto a stereo track
(Bounce)" (p. 82).
8
Repeat Steps 1 to 7 as many times as necessary
to make the required number of recordings.
9
If you wish to store the recorded audio, save
the current song (p. 70).
"Setting the left-right position of each track (Pan)" (p. 82)
"Setting an audio input's left-right position (Input Pan)" (p. 63)
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