Filter
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System 5-B Digital Audio Mixing System Operation Manual Channels and Strips
109
Filters
Two filters are available on each channel. Each filter can be one of four filter types:
high-pass filter (HPF), low-pass filter (LPF), band-pass filter (BPF), and notch filter
(NTCH). The knobs are used to control the two filters that can be active at one time. The
displays are F2tp (filter 2 type), F2Q(filter 2 Q), F2fr (filter 2 frequency), F1tp (filter 1
type), F1Q(filter 1 Q) and F1fr (filter 1 frequency). Select a filter type by rotating the
knob. Disable the filter by selecting OFF. Rotate the frequency knob to select the filter
frequency. Rotate the Q knob to change Q for a notch filter or bandwidth for a band-
pass filter. Each filter can be switched In/Out separately. The filters are not attached to
the EQ.
See Section 8.4.2 on page 115 to learn how to change the EQ’s signal path order.
Filter Q is variable from 0.2 to 12.
To help find problematic frequencies, the Notch filter can be put into a listen mode
which temporarily changes the filter to band-pass by pressing the Listen key next to the
frequency knob. The listen setting is not saved in the Title and is not automated. Listen
defaults to Off.
8.3.4 Aux Sends
The CM401 Master module has a Group/Aux Strip used for Aux Master functions. See
Section 7.2 - Bus Master Functions for general information and Section 7.2.6 - Group
and Aux Busses to learn how to set up mono and stereo Aux busses.
Aux Sends can be mono or stereo odd/even pairs (i.e., 1/2 not 2/3). Each Aux Send can
be configured as pre- or post-fader (Figure 8-12).
Aux Send Knobsets
Figure 8-12 shows the first eight Aux busses with Aux Sends 1/2 and 7/8 set as stereo
pairs and others are mono. Press the X key to display additional busses. Stereo busses
use two knobs:
• The Pan knob (top) adjusts the stereo Pan and its lower-left key switches Pan
in/out.
• The Gain knob (labeled with the send numbers) adjusts the overall Gain for
both sends and its lower-left key switches the pair in/out. The upper-left key
switches the send from post- to pre-fader.
• Mono busses use one Gain knob and its lower-left key switches the send in/out.
The upper-left key switches the send from post- to pre-fader.