Yorkville Sound AP312 User Manual

natural frequency response does not have to be compromised because of one mic

and one speaker. Ideally, a Real-time Frequency Analyzer and Pink Noise would be

employed before the audience arrives to help you pre-adjust the EQ(s) to cut obvious

system/room response spikes likely to cause feedback later on. Without such devices

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 AP312’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 processor. 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 processor is permanently routed to the MASTER

EFX fader and thereafter to the LEFT & RIGHT MAIN MASTER busses, also to the EFX

to MON master control and thereafter to the monitor bus.

User tip: The EFX SEND/FOOTSWITCH jack can be used as an auxiliary mono out-

put. The internal effects will not be disabled and can be used as per normal.

Master EFX Send Control & Clip LED

For the quietest performance, you should run the MASTER EFX SEND level as high as

possible without causing distortion. With the channel EFX SEND controls turned up

roughly half-way and signals coming 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.