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4.4 Monitor vs. Master Level
It’s important to make a distinction between
MONITOR LEVEL control and level of the
stereo bus output, as controlled by the
MASTER FADER.
When using the US-224’s analog inputs,
only the TRIM controls actually affect the
input level to the audio software application.
When using the US-224’s Digital inputs, the
digital audio data received at the US-224’s
digital input is passed directly to the audio
application without any gain or other
modifications.
When monitoring audio playback from the
application via the US-224, the level is
controlled by that track’s software gain
control (which, in turn, is controlled by the
US- 428’s channel FADERs), the MASTER
FADER, and the LINE OUT or PHONES
OUT level controls.
The LINE OUT and PHONES level controls
directly affect the audio levels that appear
on the LINE OUTPUT and PHONES jacks,
respectively. The audio level produced at
the DIGITAL OUTPUT is not affected by
either control.
The MASTER FADER is the final level
control affecting the digital stereo output to
the application, consequently changes made
to the MASTER FADER level will also affect
the output level to the speakers.
Thus, if you want to simply reduce the
volume of your listening environment, you’ll
want to use the MONITOR LEVEL control
to do this without affecting the level of your
stereo mix.