Boss Audio Systems BR-900CD User Manual

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Panel Descriptions
Front Panel
Input section
SENS knob
Use this knob to adjust the sensitivity at the input jacks (e.g., 
GUITAR/BASS, MIC1, MIC2, and LINE).
PEAK indicator
This indicator shows how strong the input level is at the 
various input jacks (e.g., GUITAR/BASS, MIC1, and MIC2).
This indicator lights at a level -6 dB lower than where sound 
distortion occurs. Adjust the input sensitivity with the SENS knob 
so that this indicator lights only occasionally, at those moments 
when you play your guitar (or other instrument) at its loudest.
INPUT SELECT buttons
Use these buttons to select the input source (input jack) that 
you wish to record. The indicator of the selected button will 
light. You can mute (silence) the input sound by pressing a 
button that is lit.
[GUITAR/BASS/MIC2]
For selecting either guitar or bass use of the GUITAR/BASS 
jack, or the MIC 2 jack.
[MIC]
For selecting either the MIC1 jack, or the internal 
microphone. 
[LINE]
For selecting the LINE jack (stereo) for the line inputs, such 
as keyboards or CD players.
SIMUL
By pressing [GUITAR/BASS/MIC2] and [MIC] 
simultaneously, you can record from both inputs at the same 
time.
* If the INPUT SELECT setting is changed, the insert effect 
INPUT LEVEL knob
Use this knob to adjust the volume of the input source for 
recording.
* If you use the INPUT LEVEL knob to turn down the volume 
of the input source during recording, the sound will be 
recorded in the audio track at a low volume, so that noise will 
be more apparent when you raise the volume of the audio track 
for playback.If you want to lower the sound of the input source 
that you are monitoring, lower the volume with the MASTER 
fader. To change the volume of the music being played back, 
use the TRACK fader for the respective tracks.
[TUNER]
This allows you to tune your instrument connected to the 
GUITAR/BASS jack.
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