Calrec SUMMA, User Manual

Page: 111 / 198

PFL, AFL AND OUTPUT LISTEN
Summa has comprehensive built-in, after fader listen (AFL), pre fader listen (PFL), and ‘output listen’ systems,
allowing you to listen to multiple combined audio feeds at various points in the signal chain.
Multiple paths can be PFL’d, AFL’d or have ‘output listen’ activated at any time to create summed mixes of pre/post fader
path feeds.
AFL
Selecting AFL for any path replaces the current feed to the console monitors with the path’s post fader feed.
AFL provides a ‘non-destructive solo,’ allowing you to quickly check individual paths whilst maintaining all mixes as they
are. Only the monitor output is affected by AFL, no paths are cut and the mix to all other buses is preserved.
PFL
By default, selecting PFL anywhere across the surface feeds the pre fader feed of the path to Summa’s dedicated PFL
speaker output. If PFL TO MON or PFL TO SMALL LS is activated within the monitor pop-up, the PFL feed will replace
the monitor source, as described for AFL above.
Output Listen
Mains, tracks, auxs and direct outputs all have an OUTPUT LISTEN option. Like AFL, this provides a non-destructive
solo, but output listen takes the feed after the addition of output delay, directly before the feed leaves the console.
Access from Faders
The figure to the below shows the location of AFL and PFL buttons on the surface. Both are either latching when
pushed, or momentary when held. PFL can also be activated momentarily by pulling the fader down below its lowest
point, and deactivated once released. Also by default if a fader is closed and its PFL is activated, it will be deactivated
once the fader is opened. These features can be switched off within the general Show settings: Tap ‘Show settings’ in
the Show menu and select ‘General’.
PFL Position in Audio Chain
The PFL point may now be placed at the Input, Pre EQ, Post EQ or Pre Fader in the Audio Path. This is accessed from
the Meter & PFL button in the Screen Header. These Selections can be made per path, or applied easily to all Paths
See Figure 1 below.
FIGURE 1 - PFL
POSITION SELECTOR
CALREC
Putting Sound in the Picture
111