Recording Equipment User Manual

THE AUDIO LEVEL CONTROLS AND MIXING
The DRIVE control adjusts the signal level at the MuRF’s
circuit input. With this control you can set the right input level
for virtually any instrument or line-level signal source. Turn this
control counterclockwise for strong input signals, and clockwise
for weaker sound sources.
The DRIVE light tells how strong the input signal is after being
adjusted by the DRIVE control. As the signal level increases, the
light goes from off, to green, to yellow, and nally to red. Very
weak signals do not light up this light at all. When the light is
green, the signal is below the level that results in audible distortion.
When the light is yellow, some low order distortion may be
audible, giving the sound a subtle warm analog quality. When the
signal is strong enough to drive the light into the red, the distortion
at the output becomes stronger and more distinctly audible. Watch
this light when you set the DRIVE control for the desired effect.
The OUTPUT control adjusts the strength of the MuRF’s signals
that appear at the LEFT/MONO and RIGHT output jacks. Use this
control to balance the MuRF’s signals with the bypassed signal.
Note that neither the DRIVE nor the OUTPUT controls affect the
strength of the bypassed signal.
USING BOTH AUDIO OUTPUTS TOGETHER
The MuRF has two audio outputs: LEFT/MONO and RIGHT.
When a cable is plugged into just the LEFT/MONO jack, the
Figure 12 – Left and Right Frequency
Response of the MuRF’s Filters
output of all lters are sent to
that jack. If a cable is inserted
into the RIGHT jack, then half
of the lters are sent to the
RIGHT output, and half are sent
to the LEFT/MONO output. .
Figure 12 shows the frequency
response of the left and right
outputs when both the left and
right output jacks are used.