4 osc filter section – Akai UNIQUEST 4000S User Manual
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UniQuest for EWI 4000s
2.2.4
OSC FILTER SECTION
SELECT
•
Choices are 1, 2 or LINK. When 1 is selected, the block of controls in this
section govern the settings of OSC FILTER 1. When 2 is selected, these controls
govern the settings of OSC FILTER 2. LINK mode is now explained.
The Oscillator Filter section consists of 2 multi-mode filters that are connected in
serial with each other. Each filter can be set individually or can be linked to realize a
double-strength filter whose parameters are set by filter 1’s controls:
The following parameters are common to each filter:
Main Filter Parameters
MODE
This control changes the filter’s basic type:
•
OFF: Filter is off, incoming signals are passed unchanged.
•
NTC: Notch - Removes a band of signal content around the filter cutoff
frequency. This signal is therefore ‘notched’.
•
BP: Band Pass - Removes signal content except for a band around the filter cut-
off frequncy. This band is allowed to pass unchanged.
•
HP: High Pass - Removes signal content below the filter cutoff frequency. High
frequencies are allowed to pass unchanged.
•
LP: Low Pass - Removes signal content above the filter cutoff frequency. Low
frequencies are allowed to pass unchanged.
FREQ
•
Range is 65.5 Hz to 10.5 kHz. This control sets the cutoff frequency of the OSC
FILTER.