Akai S3000XL User Manual page 110

EDIT PROGRAM - SINGLE
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:
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:
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
Page 104
ROLL-OFF SLOPE CUTOFF FREQUENCY
L
E
V
E
L
FREQUENCY
FREQUENCY
L
E
V
E
L
FREQUENCY
HARMONICS
CUTOFF
Resonance = 31
Resonance = 24
Resonance = 12
Resonance = 0
S3000XL Operator's Manual