Yorkville Sound AP312 Effects Bus Routing Overview, Master EFX Send Control & Clip LED

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.

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