Filter - Akai S1000 Series Operator's Manual

Sampler functions

FILTER

The FILTER page (
sound of samples within a keygroup. Essentially, the parameters on this page are what
you would expect to find on an analog synthesizer (though the S1000's filter is digital).
The top line of the page allows you to select the keygroup number and ALL/ONE, or to
alter the program which is currently being edited.
The next line allows you to adjust the cutoff frequency of the filter. At its highest value
(99), the filter lets all the sound through, and at its lowest, (00) no sound passes through.
Unlike the filters on some synthesizers, however, there is no resonance control, and the
filter cannot go into self-oscillation.
The next parameter,
of the key played will affect the cutoff frequency of the filter. When this is set to a
positive value, the higher the key played, the brighter the sound (negative values reverse
this effect). This parameter sets the amount of this tracking. This can be used to simulate
the effect of natural acoustic instruments.
"
velocity > freq
with which a key is pressed. The value can be set from values of +99 to -99. A positive
value will make the sound brighter, the faster the key is depressed, and a negative value
will make the sound duller, when the key is pressed faster.
The next parameter,
altered by the amount of aftertouch (Channel Pressure). Again, this value is variable from
+50 to -50, and positive values will increase the brightness of the sound when aftertouch
is applied; negative values will make the sound duller.
"
envelope-2 > freq
the frequency of the filter. Variable from +50 to -50, a positive value will produce a
"wah" effect, and a negative value will produce an "inverted wah".
At the bottom of the page are two parameters which are not strictly related to the filter, but
are related to the control parameters transmitted from the keyboard and the way in which
they affect the sound of the keygroup. The first is
This controls the overall volume of the keygroup as determined by the velocity of the key
pressed, and is an offset added to (or subtracted from) individual sample levels. Positive
values will make the keygroup louder the faster the key is depressed. Negative values will
have the opposite effect.
Page 54
) allows you to apply a 18dB/octave low-pass filter to modify the
FILT
", sets the amount (from-24to 24)by which the position
"
key follow
allows you to affect the cutoff frequency, depending on the velocity
"
" ",
pressure > freq
determines the effect of the second ADSR envelope generator on
"
allows the cutoff frequency of the filter to be
"
vel> loud offset
(+50 to -50).
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Version 2.0 89/11