Alesis prolineardsp User Manual

 

There are three additional settings for the Q parameter that 

are found below the value of  0.25: HSH, LSH, and HP. Here’s 

what they do: 

 

The LSH (Low Shelf) setting affects everything 

below the specified frequency, similar to 

conventional tone controls on a home stereo. For 

example, if  Band 1 is set for Low Shelf  and the 

frequency is set to 800Hz, everything from 800Hz on 

down will be boosted or cut. The following diagram 

shows high or low shelving: 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HSH (High Shelf) works the opposite way. When 

this function is turned on, everything ABOVE the 

set frequency will be affected. 

 

The HP (High Pass) setting turns the Band into a 

highpass filter. This button disables the Gain 

parameter for the Band. When this setting is in 

effect, all audio below the Band frequency setting will 

be filtered out at a slope of  6dB per octave. Its basic 

function is as a bass frequency rolloff.