Crest Audio X-VCA Manuel d'utilisateur télécharger pdf (Page 15)

p. 15

high-pass filter—HPF

Proper use of the high-pass filter reduces or eliminates unwanted low frequencies

without substantially affecting the program material. Quite often such unwanted

low frequencies are included with in-coming mic- or line-input signals. For exam-

ple, stage rumble or wind can be picked up through vocal mics.The slope of the

high-pass filter is 12dB per octave.

HPF

High-pass filter is on.

HPF—variable control

When the high-pass filter is on, this control selects a frequency between

20Hz and 400Hz as the point where attenuation begins.

mono input module

Many microphones

have a built-in switch-

able high-pass filter.

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Crest Audio X-VCA Manuel d'utilisateur Page 15