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24
Setting the Correct Gain
Structure
h. Once you’ve set the optimum level in step (g) above, continue
playing the instrument and slowly raise the power amplifier volume until
you reach the level you want to hear.
i. Repeat step (g) above for each instrument connected to the
MIXPAD channel line inputs.
j. The procedure for setting optimum microphone levels is virtually
identical; sing or speak into the mic at the level you expect to use in
performance while slowly raising the Level control for that channel to its
2 o’clock “0” position. Then carefully raise the Trim control for that
channel until the main Left/Right peak LEDs in the main section just
begin to light occasionally during the loudest signals. Again, listen
carefully for any signs of audible distortion or unusually weak signal
(indicating a likely fault in cabling).
k. If you have any outboard signal processors connected to the Aux
send and return jacks on the rear panel, follow this step. Because
outboard effects processors can sometimes be quite noisy, it’s
particularly important to maximize the amount of signal being sent to
them via the MIXPAD Aux sends. The idea is to drive these devices as
hot as possible (short of overloading them) and then to use the
corresponding Aux return level to carefully adjust the amount of
processed signal being blended with the dry signal. To set optimum
Aux send levels, use a channel that has already had its gain structure
adjusted in step (g) or (j) above. Turn the Aux send knob(s) for that
channel to the “0” (unity gain) position and then play the instrument
(or sing into the microphone) connected to that channel. Adjust the
input levels of connected outboard effects processors so that their meter
shows incoming signal normally in the 0 vu range (with only occasional
higher excursions). Then it’s time to optimize the Aux return levels.
While continuing to play your instrument (or continuing to sing into the
microphone), slowly raise the Aux return level control(s) until you hear
the desired amount of processed signal added to the dry signal.
For more information, see the “Using the Aux Sends and Returns”
section on page 32 in this manual.