Operating Manual - digiMIX24 Digital Mixer
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Attack Time
- The rate at which gain reduction occurs to the input signal when it exceeds threshold, from 10ms to 150ms.
Release Time
- The rate at which gain reduction ends once the signal falls back down below threshold, from 10ms to 1000ms.
Ratio
- This sets the amount of gain reduction applied to the signal above the threshold point. Ratio is from 1:1 to infinite.
Post Gain
- The post gain control adjusts the compressor/limiter output level to make up for any loss of overall level due to gain
reduction. It is typically used to match the level of compressed output with the original un-compressed input level, allowing an
easy way to compare signal with and without compression.
Compression occurs when any signal above threshold has its gain reduced by the ratio settings. For example, a ratio of 4:1 means that as
input signal increases above the threshold by 4dB, its output signal only increases by 1dB. The higher the ratio, the more gain reduction
occurs. Use a compressor to minimize vocal peaks or instrument transients, or to reduce the dynamic range of a signal.
A limiter is a compressor with infinite ratio. The input signal cannot exceed the threshold at all. A limiter is primarily used on outputs for
speaker protection or setting maximum SPL, whereas the compressor is more natural sounding and typically used on microphone inputs.
4.6 Input Channel and Subgroup Stereo Linking
The following examples show how channel stereo linking, subgroup stereo linking, and the pan and adjust control work together.
4.6a - Stereo Channel Linked Only:
In this example, Ch01 and Ch02 have been stereo linked.
1) Ch1-2 are linked and assigned to the Main output only, not to Sub1 or Sub2. The Adjust knob
controls the level of both channels together to the main output.
2) Because the two channels are stereo linked, they are initially panned full left and full right, but
can still have their individual stereo position adjusted using the pan control when either channel
is selected. Their signal is routed to the main stereo output.
3) In the Long Faders mode example (shown), the selected channel in a linked channel pair is
indicated with an orange bar below the pan bar. In short fader mixer mode (not shown), the
selected channel fader on the left side of the touchscreen combines the two linked channels into
one fader, with a pan bar for each channel indicated separately above and below the fader. In
either mode, the two channels are linked but their pan can be individually adjusted.
4.6b - Sub1/Sub2 Link Only:
In this example Sub1-2 are stereo linked, but Ch01 is not linked,
1) Ch01 has been assigned to the linked Sub1-2 mix, but not to the main mix.
2) When Ch01 is selected, the pan control will adjust the stereo position of Ch01 to the main mix, but
since Ch01 is only assigned to Sub1-2 and not to the main mix, the pan control will have no effect.
3) To pan Ch01 to the linked Sub1-2 mix, first press the Sub1 Send button. In the resulting screen,
make sure Ch01 is selected, then use the Pan control to adjust Ch01 pan to Sub1-2. The Ch01
pan settings to Sub1-2 will be remembered after exiting the Sub1 Sends screen, and will remain
unaffected even if Ch01 pan settings are changed later from mixer mode.
4) To enable or disable Sub1-2 routing to the main mix, press the Sends button below the touchscreen,
then press the Main select button to open and configure routing of signals to the main output.
When enabled (On), the linked subgroup is routed to the main output mix as well as the Sub1-2
output jacks. When disabled (Off), the linked subgroup is routed only to the Sub1-2 output jacks.
5) When Sub1-2 are first linked,
they are initially panned full left and full right, but can have their
stereo position to the main mix individually adjusted with the Pan control when either Sub1 or
Sub2 is selected. Note that the Pan control applied to linked Sub1-2 only affects the signal if
Sub1-2 are enabled to the main mix (see step 4 above).
Figure 4.6a: Channel 1 and 2
are stereo linked
Figure 4.6b: Channel 1 and 2 are
not
linked,
channel 1 assigned to Sub1 or Sub2,
Sub1 and Sub2 are stereo linked
