Hpf; Lpf - Alesis PEQ-450 Reference Manual

basics of equalization • chapter 3

HPF

The
H P F
disables the
all audio below the Band 1 Frequency setting will be filtered out at a
slope of 12dB per octave.
Think of this function as a severe bass rolloff. It is useful for getting
rid of low-frequency hum, mic bumps, and rumbles.

LPF

The button turns Band 5 into a lowpass filter. This button
LPF
disables the
all audio above the Band 5 Frequency setting will be filtered out at a
slope of 12dB per octave.
Think of this function as a severe treble rolloff. It is useful for getting
rid of tape hiss, TV or computer monitor whine, and other high-
frequency noises.
+12dB
-12dB
30
button turns Band 1 into a highpass filter. This button
and
GAIN Q
and
GAIN Q
+9dB
+6dB
+3dB
0dB
-3dB
-6dB
-9dB
40Hz
knobs for Band 1. When this function is on,
knobs for Band 5. When this function is on,
Frequency
200Hz 1kHz 10kHz 20kHz
PEQ-450 Reference Manual