Yorkville Sound AP312 owner manual Digital Effects Processor, Phones Jack, Level Control & Sources

Digital Effects Processor

The internal Digital Effects Processor is a full 16 bit, 20kHz bandwidth DSP-based effects subsystem developed by Applied Research & Technology in Rochester, New York. It has been custom pro- grammed 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 mix- ing. 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 application

EFX Footswitch/Send Jack A standard on/off footswitch (optional)

plugged into this jack will enable you to turn the internal effects system on and off. Optionally, this jack may be employed to feed the EFX signal to an external effects unit the output of which could be returned via an input channel - perhaps channel

9/10 or 11/12 if the effects unit is stereo. In

this mode, the channel fader would become the master effects return control, there- fore be sure to set that fader fairly low and adjust to desired levels. Be sure to turn the EFX send control off in order to avoid creating a loop. Also, be sure to pull the EFX MASTER fader down to the off position.

Phones Jack, Level Control & Sources

The PHONES jack accepts standard stereo headphones and is located in the upper right area of the panel. The PHONES level control is located in the lower right area. The source for all headphone signals is the MONitor bus until a CUE button is depressed at which time only the cued channel can be heard through the phones.

Level Meters

These meters follow either the Left and Right MAIN bus activities or a mono mix of the mains on the Left-meter and monitors on the Right-meter, all depending on the position of the EQ/AMP ASSIGN button. If either or both CLIP lights at the top of the level meters is flashing too much of the time, lower the appropriate MAIN MASTER level to avoid possible distortion on peaks.

Amp 1 & 2 Inputs

These are switching jacks, which enable you to directly access either or both chan- nels of the built-in power amplifier while disconnecting them from normal internal functions. This permits you to insert an external-EQ, a processor/crossover (e.g. élite) or a compressor/limiter between the mixer section’s POST EQ LINE OUTPUTS and the AMP 1 & AMP 2 INPUTS thus providing the 100% signal processing essential for these functions to work properly.

User tip: If you have an electronic-crossover or processor/crossover, you can drive subwoofers and full-range cabinets in a biamped system with the AP312. The hookup goes as follows:

1.With the EQ/AMP ASSIGN button down in the MAIN/MON position, run a patch cable from the POST EQ MAIN (L) LINE OUTPUT to the input on an electronic crossover/processor.

2.Now run a second patch cable from the low-frequency or subwoofer output on the crossover to the AP312’s AMP 1 INPUT and a third patch cable from the crossover’s high-frequency or full-range output to the AP312’s AMP 2 INPUT.

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