Meters - Alesis Studio 32 Reference Manual

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switch. (When SOLO is not in use, these green LEDs will flash in response to input
level, but they won't turn on solid.) There's also a master solo LED that shows you
when the solo system is active.
Like all mixes in the Studio 32, the solo system has its own MASTER control, which
is used to adjust the level feeding the Control Room knob. Right below that is the
SIP/PFL switch, which is a source-select switch for the entire solo system. When
the switch is up, the solo source is SIP (for Solo-In-Place). This is the traditional
"stereo solo" position that puts the soloed signal in the mix at the same volume and
pan position as it is when the solo system is off. When the switch is down, the solo
source is PFL (for Pre-Fade Listen), which allows you to hear what the channel
source is in the control room, even if the fader is down, muted, or not assigned. The
advantage of PFL is that you can use it to check signals before bringing them into
the main mix (for example, to cue up a tape for playback or check to see what
microphone is plugged in).
In either SIP or PFL mode, the SOLO switches of the Studio 32 are
"nondestructive", meaning that they never affect any other mix than the Control
Room mix.

Meters

Generally, whatever you're hearing in the Control Room is what's being displayed
on the L/R meters, including SOLO/PFL. Any channels that are soloed will appear
on both the left and right meters. In PFL mode, this is a good way to set the TRIM
level for the proper headroom. (See page Error! Bookmark not defined. for more
about using the meters.)
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Studio 32 Reference Manual