Mixer Input Channel Strips - MOTU 1248 User Manual

MIXER INPUT CHANNEL STRIPS

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To access a mixer input channel strip, go to
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the Mixing tab (page 22), reveal the side bar
(item #3 on page 22), and show the input
channel in the Mixer Inputs section (31). To
show and hide sections of the channel strip,
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such as EQ or the compressor, use the Controls
section of the side bar (item #3 in the Mixing
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tab on page 22).
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1. Click the input channel name to change
it. Delete the current name to restore the
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default name.
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2. Provides hardware settings for the input.
For example, if the input is a mic input,
you'll see settings for preamp gain, 48V
phantom power and so on. If the channel
has been assigned to an input on another
AVB device on the audio network, you can
use these settings to control it remotely.
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3. Choose the source for the input channel.
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You can also make this setting directly on
the Routing grid (page 20).
4. Create and recall channel strip presets.
5. Toggles the input between mono and a
stereo pair.
6. High Pass Filter with cutoff frequency.
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7. Each effect in the channel strip (High Pass
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Filter, Gate, EQ, etc.) has an on/off button
on the left and a preset menu on the
right, for managing presets that apply
only to that processing module. For
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example, you can create your own EQ
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presets for the EQ modules.
8. The Gate processor provides standard
attack, threshold and release controls.
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9. The Gate indicator turns red when the
gate is engaged.
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10. The EQ section provides four bands of
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parametric EQ, each with standard Gain,
17 Frequency, and Bandwidth settings.
11. The High and Low EQ bands provide a
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Shelf filter button for standard high and
18 low shelf filtering.
12. The thumbnail EQ Graph displays the
currently enabled EQ filters, if any. Click it
to open the full-size, editable EQ Graph
(Figure 8-3 on page 83).
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13. The Compressor provides standard
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controls for Threshold, Ratio, Attack,
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Release and Gain. Normally, the compres-
sor operates in Peak mode, where signal
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peaks determine the input level. Engage
the RMS button to uses RMS values (a
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computational method for determining
overall loudness) to measure the input
level. Engage Auto makeup gain to
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compensate for any gain reduction.
14. Input level and gain reduction meters for
the compressor.
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15. The thumbnail Compressor Graph
provides a graphic representation of the
compressor, when enabled. Click it to
open the full-size, editable Compressor
Graph (Figure 8-5 on page 84).
16. Aux 1-2 send.
17. Pan for the Aux 1-2 send. This is enabled
in the Aux mix tab (item #11 on page 23).
18. Solo/Mute. Mute affects all sends as well
as the main channel. Pre-fader sends are
not affected by Mute.
19. Move the fader to adjust level. Double-
click to return to zero (unity gain) or -∞.
20. Click the dB scale numbers to make the
fader jump exactly to that level. Click and
drag horizontally to jump consecutive
faders to the same level.
21. Click to type in an exact dB level.
22. Channel pan. For mono inputs, double-
click to center.
23. Main Mix Slider is used to feed signal to
the Main Mix. Slider is set to 0 dB by
default, so all channel strips are pre-
routed to the Main Mix bus. If a channel is
being sent to a Group (which will eventu-
ally be fed to the Main Mix), drag the
slider to -∞ so it is not sent to Main Mix
directly.
24. Group sends.
25. Makes the input the source for talkback.
26. See "Talkback" on page 57.
27. 'S' lets you solo the group. 'PRE' toggles
the sends between pre- and post-fader
routing, i.e. before or after the channel
fader.
28. The input level meter (behind the fader
handle, 19) can display either pre- or
post-fader levels. Toggle here.
29. Clears all solos.
30. 'S' lets you solo the Aux bus. 'PRE' toggles
the sends between pre- and post-fader
routing, i.e. before or after the channel
fader. The dots let you toggle the Aux bus
between mono and stereo.
31. This side bar, with the section labels in it,
can be shown or hidden using the Legend
switch in the Controls section of the side
bar (item #3 in the Mixing tab on
page 22).
32. Shows how much DSP power is being
used by the mixer hardware. To free up
DSP bandwidth, try reducing the number
of mixer ins, disabling channel effects,
reverb, etc. See "DSP Usage" on page 87
for more info.
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