Setting The Gain - M-Audio DMP3 User Manual

Setting the Gain

The DMP3 provides up to 66dB of gain on the XLR and 1/4" high
impedance inputs. Microphones and guitar pickups typically emit a low
signal level, requiring a "pre-amp" such as the DMP3. Other instruments,
such as keyboard sound modules, may also benefit from a little bit of punch
from the DMP3.
Plug in your mic or instrument with the gain controls turned down, then
turn the gain up incrementally while testing the mic or playing the
instrument. When the VU meters show activity at a fairly consistent level,
you've reached a good signal level for the DMP3 (see section, "VU meters").
Some users may wish to experiment a little further to find what audibly
might be referred to as a "sweet spot." Note that when the "clip" LED lights,
it is indicating that the signal is at least 4dB below clipping. Let your ears be
the judge, but when the clip LED lights and stays lit, you are approaching or
have reached distortion in your DMP3 signal.
NOTE: You must also consider the level that is being sent from the
DMP3 to your recording device, sound card input, mixer or sound
system. Check the input meters at the receiving device and make sure
that they are neither too low nor clipping (too 'hot'). You may be able
to adjust the input level or operating line level of this device, otherwise
an adjustment in gain on the DMP3 may be necessary.
Sound cards and other recording devices may or may not have an input level
adjustment. If your recording device (tape recorder, computer & sound card,
etc.) does not provide input level adjustments, then the signal level that you
use to record will rely totally on your source (voice/mic, guitar/instrument,
etc.), and the level you set on the DMP3. If your recording device does
provide input level adjustments, then we suggest using a unity gain setting
as a starting point. This is usually around the 2:00 position, though your user
guide may provide more information.
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