PreSonus BlueMAX - Manual (Page 15)

Connecting for stereo operation.
3.3 BASIC OPERATING PROCEDURES
Setting Compression Amount
Your Blue Max was designed with a fixed threshold mode of operation. This differs from other
compressors in the fact that there is no threshold control. This offers the unique ability to
immediately hear the sometimes subtle differences between presets which each have unique
threshold settings. In setting the compression amount, always begin with the Input control all
the way counter-clockwise (-20dB), and slowly increase the input until the Gain Reduction
meters begin to register the compression activity. The more you crank up the Input the more
compression your signal will experience. Always pay close attention to the best judge of your
sound, your ear. You should also frequently remove the compression from the signal using
the Process button to listen to the changes in your sound. In modem recording practice, it is
customary to adjust the Output control such that the Input and Output level are of equal
amounts according to the Input/Output meter. This gives you an equal level output so that
you can switch processing in and out to compare difference.
Mono Operation
Your Blue Max was designed with a high gain mono input to act as a preamp for instruments
such as guitar and bass. Of course, you can also connect your keyboards, etc. in this mode.
Note: It is very important not to rely on the high input gain of the Blue Max to boost the level
of a signal too low to record or amplify, other than that of instruments such as guitar and
bass. Be sure that you are sending the Blue Max at least a moderate level before setting the
compression. In this manner you avoid unnecessary input amplifier noise.
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