QSC Audio ISIS 215PCM - Manual (Page 23)

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PROCESSOR USE: General Guidelines and Preset Description
NOTE! The factory setting for all eight Preset memories is wire-
through. Signals are passed from input to output without any
processing. Each Processor must be configured as desired by
the user. You may select configurations from the sample files
(*.cfg) within Signal Manager or create your own.
Factory Presets
This is a professional level DSP product that allows the user
to produce virtually unlimited signal processor variations
and configurations. Because of the infinite configuration
possibilities of digital signal processing, it is possible to
create configurations that may result in unwanted signals
or uncontrollable output.
The Signal Manager software has no way of knowing if the
DSP configuration you have designed will produce the
results you intend. You can create signal loops in a
configuration that may oscillate and damage your sound
system if applied to the unit. When applying an untested
configuration or when designing or experimenting with this
unit, it is a very good idea to turn down the amplifier’s
physical gain controls. That way, you won’t damage your
speakers or create very loud sounds if you apply a configu-
ration that doesn’t do what you thought it would.
IMPORTANT! Please read before operating this Digital Signal Processor with your audio system.
As a general rule, DO NOT CREATE SIGNAL LOOPS! Do not
mix the output of a DSP object back into its own input!
There is nothing useful to achieve by doing this, you will
only create an oscillator that could damage your speakers.
Also, USE THE SINE AND NOISE GENERATOR OBJECTS
WITH GREAT CAUTION! These functions produce signals
that can harm your speakers. Start with lowered gain
settings. If you don’t hear a signal when you think you
should, DO NOT INCREASE THE GAIN!!! If the signal isn’t
audible at lower levels, there is something else wrong.
Turning up the gain to full exposes you and your system to
the possibility that some loose connection somewhere will
suddenly send a full-amplitude signal through your sound
system.
Like all freely configurable signal processing tools, this DSP
will do what the configuration your design tells it to do,
which may not be what you expect it to do, so use caution.
General Use Guidelines for Freely-Configurable DSP