Manual Allen-Heath ML 3000 (page 29 of 48) (English)

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ML3000 User Guide 29

Using the Dual Inputs.

The 2 (6 optional) stereo channels let you connect

up to 4 (12 optional) stereo sources. Two sources

may be plugged into each channel strip. Either may

be selected or both can be mixed together as a

common source.

The possibilities are endless. The advantage is that

you can connect many stereo sources without

wasting channels. Here are a few examples:

Effects Returns. Typical application of the stereo

channels is to return the processed output from

effects devices such as reverb and multi-effects

units. With full routing available you can send the

effects to the main mix, groups and auxes as

required. The LCRplus panning lets you position

the stereo return in the 3 speaker mix, for example

reverb mostly to LR with a little blended to C. Too

much returned to C may affect intelligibility. The

signal routes in stereo to LR but sums into mono

when blended to C.

To save channels you could return two effects to

the same stereo strip, adjusting the gain separately

for each. This is convenient when you are working

with several effects returned to the same mix, for

example different reverbs.

Stereo Playback. You may have a CD player for

walk-in music and a DAT or similar player for pre-

recorded announcements. You could connect both

to the same stereo channel and simply start the

player, or switch the A or B input on, as required.

Sound Effects. Here, you could connect two

effects players such as MiniDisc to the same stereo

channel. This lets you handle quick fire cues using

two machines rather than trying to cue up a single

player. Alternatively this could be used for a

backup machine.

Using Mono Sources

The stereo channels can also be used with mono

line level sources. Plug into either the left or right

channel connector and press the MONO switch.

You can also mono a stereo source by pressing

both MONO L and MONO R together. Use this

when the stereo image is too wide or not

appropriate for the application.

Using the Equaliser

The channel equaliser can be used to creatively

enhance or correctively improve the tonal quality of

the sound. For example, to brighten up a dull

sound so that it stands out in the mix, to cut back

rumble or hiss on a noisy reverb, or to shape the

response of low level walk-in music.

Before using the equaliser make sure that the

source is correctly adjusted, especially if it includes

its own filters or EQ. Start with the EQ set flat and

apply only as much boost or cut as is needed.

Use HF to add sparkle to the sound, or to remove

hiss. HM centred around 2.5kHz can be used to

add presence and improve intelligibility by

brightening up the sound and helping it cut through

the mix. LM centred around 250Hz can be used to

add warmth or reduce low frequency boominess.

Use LF to add punch to the low end, or to remove

source rumble and low frequency noise.

Use the in/out switch to compare the original and

equalised sound. The equaliser has a flat response

and therefore no effect when all the cut/boost

controls are set to their centre detented position.

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Allen-Heath ML 3000 Manual

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