Ashly Keyboard Input Processor SC-44 - Manual (Page 5)

VI. CHANNEL CONTROLS
A. GAIN
The GAIN control adjusts the gain of the input stage of the SC-il4
to accommodate a wide range of input levels. Start with this con­
trol at its center setting and adjust as necessary. Decrease the
gain if the ’’peak" indicator illuminates unless deliberate overdrive
is desired.
B. EQUALIZER
The channel equalizer is a low and high shelving type with
turnover points of 300 and 3000 Hz and is used to adjust the tone
of each individual input.
C. LEVEL
Used to adjust the level of the channel in the main mix AFTER the
gain and equalization are adjusted.
VII. MASTER CONTROLS
A. MASTER
Used to set the summing amplifier gain AFTER the channels are
adjusted to establish overall operating level.
B. MASTER EQUALIZER
The six equalizer controls are divided into three bands. Each
band has a boost-cut and a frequency control. The low and high
bands have a "shelving” type action, meaning that all frequencies
below the low setting and above the high setting are affected by
the boost-cut control. The mid equalizer is a "peaking" type,
having maximum effect at the mid frequency setting and less effect
on lower and higher frequencies. Equalization settings will vary
widely depending on the type of instrument, speakers and cabinets
used, and the type of sound desired. It is always a good idea
to start with a "flat" setting as a reference and adjust from this
point.
C. PRE-POST
This switch selects the signal sent to the PA outputs. The PRE
position provides a "flat" signal to the PA regardless of the SC-4M
master equalizer settings, while the POST position includes the
equalizer in the PA signal. Note that this switch affects only the PA
outputs and that the STAGE signal is always equalized. As a general
rule, use the PRE position if the PA or studio console has a good
input tone contrql, and use the POST position if it does not.
D. LEVEL
These two controls independently adjust the levels of the signals
at the PA and STAGE outputs. They should be adjusted to the desired
level after the GAIN and EQUALIZER controls are set.