Focusrite Scarlett 18i20 User Manual page 24

Clip light
The meter is colour coded; if the red portion at the top illuminates, the signal level is too high and
digital clipping may occur. This can sound very unpleasant and should be avoided at all times! You
will need to reduce the signal level either at source in the case of DAW tracks or external digital
inputs, or by adjusting the GAIN controls on the Scarlett 18i20 in the case of the analogue inputs.
The red clip light remains illuminated once it has been triggered by excessive signal level; when the
signal level has been reduced, click on the red area to reset it.
Mute
Clicking this button mutes the channel; it illuminates red when Mute is active.
Solo
Clicking this button solos the signal; all other channels in the current mix are muted. The channel
fader remains active. The button illuminates yellow when Solo is active.
PFL (Pre-fade listen)
Clicking this button performs a "non-destructive" solo; the signal in the channel is routed to the
main Monitor Outputs 1 and 2. The soloed signal is pre-fade (i.e., its level will not be affected by the
fader). PFL is purely a monitoring function and all other channels remain active with all signals still
routed. The button illuminates green when PFL is active.
Stereo
You can use this button to create a stereo channel from two consecutive mono channels (odd = L,
even = R). Note that the mixer channel graphics alter; a single fader controls the stereo signal, but
the meter has separate L and R bargraph displays.
Channel Name
Each mixer channel may be named; by default, the names are the channel numbers. Double click the
name to rename the channel to something more useful such as Vocal Mic.
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