Digital Effects Processor; Efx Footswitch - YORKVILLE AP812 Manuel De L'utilisateur

you can achieve a vaguely similar result by simply turning up the level until a mic feeds
back, then reacting accordingly (this may or may not involve the EQ's). In any case, the
prime suspect whenever feedback starts is always a monitor. A graphic EQ with a MIC
level input can be inserted between the offending mic and the mixer input to solve that
channel's problem without altering the whole monitor system response.
Effects Bus Routing Overview
The AP812/818's effects bus receives and mixes down all the channel EFX SEND sig-
nals. Its output is regulated by the MASTER EFX SEND control and is internally routed,
first to the EFX SEND / FOOTSWITCH jack. This is a switching jack which normally
allows the signal to proceed
internally to the effects pro-
cessor. But when a jack is
inserted here, the switching
function reroutes the effects
bus signal out the jack to
either an on/off footswitch or
whatever you have patched
it to, probably an external
effects unit, or possibly
something else if you have
decided to do without effects
and perhaps feed a broadcast
transmitter or recording unit.
In any case, the output of the
internal digital effects proces-
sor is permanently routed
to the MASTER EFX fader
and thereafter to the LEFT &
RIGHT MAIN MASTER bus-
ses, also to the EFX to MON
master control and thereafter
to the monitor bus.
Master EFX Send
Control & Clip LED
For the quietest performance,
you should run the MASTER EFX SEND level as high as possible without causing distor-
tion. With the channel EFX SEND controls turned up roughly half-way and signals com-
ing into the channels, increase the MASTER EFX SEND level until some EFX CLIP LED
activity is observed, then turn it back down slightly until the flashing stops. You may now
re-adjust the channels EFX levels as desired. The MASTER EFX SEND may now be used to
tailor the EFX mix on all channels at once.

Digital Effects Processor

The internal Digital Effects Processor is a full 16 bit, 20 kHz bandwidth DSP-based effects
subsystem developed by Applied Research & Technology in Rochester, New York. It has
been custom programmed with 255 effects ranging from reverb to echo and special effects.
The selection of effects was determined in collaboration with a panel of sound engi-
neers experienced in live performance mixing. The panel was asked to choose effects
which would be of the most practical use in actual live performance situations. As
a result you will find the
internal system to be more
than adequate for most
applications.

EFX Footswitch/

Send Jack
A standard on/off footswitch
(optional) plugged into this
jack will enable you to turn
the internal effects system
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