Akai CD3000XL Operator's Manual download pdf (Page 110)

EDIT PROGRAM - SINGLE

Page 104 S3000XL Operator’s Manual

sound. As the resonance amount is increased, so the width of the response slope gets

narrower so that individual harmonics are emphasised.

The high pass filter offers this response slope:

HARMONICS

CUTOFF FREQUENCYROLL-OFF SLOPE

FREQUENCY

In this example, you can see that low frequency components are removed whilst high

frequencies pass through. This filter can be used to make sounds very thin and brittle. For

example, this type of filter may be used effectively on an oboe sound or harpsichord

sound. When the resonance is increased, the area around the cutoff frequency is

boosted and so harmonics around that frequency will be emphasised.

The final mode selection is quite unlike those shown above. Selecting EQ turns the

second filter bank into a simple one band equaliser with variable frequency and resonant

cut/boost that can be used for a variety of different effects. With the EQ selection, the

‘straight’ sound from Filter 1 is also passed through unaffected and you can use this EQ

section to highlight specific frequencies in the sound. This filter is also able to be

controlled by any of the modulation sources we have seen so far and using it with a high

resonance setting in conjunction with any of these modulation sources, you may create

interesting sounds not unlike phase shifting.

The response slope for the EQ selection is shown below:

CUTOFF

FREQUENCY

Resonance = 31

Resonance = 24

Resonance = 12

Resonance = 0

With resonance at 16, the frequency response is flat but as the resonance is increased,

the gain of the filter is boosted around that frequency. If the resonance is decreased, the

gain is cut as the resonance gets sharper.

The fields on the FILTER 2 page are as follows:

The parameters across the top of the page follow the usual convention and allow you to

select the keygroup for editing, select whether you wish to edit just one keygroup or all

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Akai CD3000XL Operator's Manual Page 110