Yorkville Sound AP812 Benutzerhandbuch

This means that you custom-equalize for the monitor system using the

AP812/818’s

EQ2 equalizer or an external EQ patched between the AP812/818’s MON OUT jack

and the external power amp you are using for monitors.

User tip: In order to shut a channel off completely, it will be necessary to turn down

the

MON send, as well as the channel fader.

3-Band EQ

Equalization is varied by four controls labeled

HIGH, MID, SWEEPABLE MID (variable

from 80 Hz to 8 kHz)

, and LOW. Each control can either boost or cut the amplitude

of its frequency band by

15 dB. This is a considerable amount of gain change, roughly

equivalent to a

150% variation in audible loudness. It is therefore wise to use boost set-

tings of not more than

+3 dB to +6 dB in order to avoid feedback and/or distortion.

User tip: On the other hand, -15 dB of CUT-capability can come in handy for solving

certain

mic or line problems. For example, substantial LOW and HIGH cuts can help

get rid of feedback plus

puffing and thumping noises from harmonica mics. Flattop

guitar mics or transducers can often benefit from a slight

MID cut to fatten the sound,

and direct or miked

bass inputs usually benefit from a fairly substantial LO cut to

avoid main system distortion.

3-Band EQ - Channels 9/10, 11/12, (15/16 & 17/18)

LOW, MID & HIGH shelving EQ is provided for the stereo channels. Here again, the

gain range is plus/minus

(+/-)15 dB. As a result, care should be taken in adjusting the

EQ above center position as a small adjustment can represent a large gain change.
Effects Send

The

EFX send control varies the amount of post-EQ, post-fader channel signal

sent to the master

EFX bus. The output of the EFX bus goes first to the EFX SEND

/ FOOTSWITCH jack and then to the internal 16-bit processor. The output of the

effects processor then goes to the

MAIN master section to be mixed with the signals

going there direct from the input channels.
Cue Button - Channels 9/10, 11/12, (15/16 & 17/18)

The

CUE feature enables you to preview channel signals via headphones before they

go to the main and/or

MONitor bus. The CUE signal is post-EQ so that the channel

equalization will be in effect through the headphones. However, it is pre-fader so you

will need to shut the channel off through the mains and monitors when cueing. Use

the

PHONES LEVEL to adjust cueing volume.

To employ this feature, simply follow these steps:

a) Connect a tape or CD-player to channel

9/10 and/or 11/12 (15/16, 17/18).

b) Pull the channel fader all the way down and turn the

MON send off.

c) Depress the

CUE button. Now that channel will have prominence through

your headphones.

d) Cue up your tape or CD track through the phones, then put it on

play hold/

pause.

e) When you are ready to insert the recorded material, simply punch the

CUE

button into the up position, then take the recorded material off

play hold/

pause and bring up the channel fader and MON send to the desired mix lev-

els.

User tip: When you have inserted the cued material into the monitors, you will be

able to adjust its monitor mix level via headphones since the monitor bus signals

are always present through the phones when no channels are on

CUE. The recorded

material’s main mix level will be audible to you through the main speaker system.

Pan or Balance Controls

This control directs the post-fader output of the channel between the

LEFT and

RIGHT MAIN masters. In a stereo setup, the PAN/BALance can be used to position

the aural image of the channel left or right within the stereo listening field.