Akai CD3000XL Operator's Manual download pdf (Page 199)

EFFECTS EDIT

S3000XL Operator’s Manual Page 193

In the effects processor, we have access to parameters that allow you to set up a wide

range of reverb effects. The reverb page is as follows:

Here, you can select from a range of reverb types that include large hall, small hall, large

room and small room. You may also select certain special reverb effects such as reverse

and gated - we will come to those a bit later. Assuming you select one of the ‘natural’

reverb effects, the parameters are as follows:

This sets the time between the original sound and the onset of reverb.

This sets the time it takes for the selected reverb type to die away.

NOTE: These are probably the most important parameters you will want to edit.

sets the delay between the direct sound and the onset of the reverb and

sets the length of the reverb decay. Adjusting these will have a profound effect on

the ‘size’ of the reverb effect you are creating. Setting longer will give a greater

sense of distance as it effectively sets the nearest wall the sound will bounce off first. If

this time is long, then we perceive that the room is much larger. By setting a long

we also increase the effective size of the acoustic environment as larger acoustic

environments cause the reverberation to last longer.

Normally, you would increase the length of the predelay as you increase the length of the

decay. It is uncommon to have a very long pre-delay and a very short reverb decay (but is

good as a special effect!). You may, however, set a long decay but have a short (or non

existent) predelay.

Another quality of reverb is its diffusion - i.e. how well the reflections

‘smudge’ together. Normally, the sound will bounce off the wall at exactly

the angle it hits it. This normally gives rise to a smooth reverb decay.

Some environments have many odd alcoves or corners and other

‘acoustic obstructions’ (i.e. a gymnasium with bars on the walls) which can

cause the sound to bounce off at random angles and this can impart an

‘echoey’ quality to the sound where you can hear some of the individual

reflections. The parameter allows you to set the density of the

reverb. Lower settings will give a more ‘echoey’ effect whilst

higher setting will give a smoother effect.

This affects the amount of ‘agitation’ the direct sound will have on the

reverb decay and this has an effect on our perception of how close we are

to the direct sound. High settings give the impression of being closer to

the original sound whilst lower settings gives an enhanced sense of

distance.

In some acoustic environments, the low frequencies die away more

quickly. This control allows you to cut low frequencies from the reverb

sound. This has the effect of making the reverb less ‘boomy’ and can be

effective on bass instruments that you may be feeding through the reverb

as it helps to ‘separate’ the reverb from the main sound thereby making

the source sound more distinct.

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Akai CD3000XL Operator's Manual Page 199

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