Working With Filters - E-Mu XK6Xtreme Keys Owner's Manual

Working with Filters

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Front panel knobs A & B
are routed to the filter
parameters and will affect the
initial settings made here.
202 E-MU Systems
Set Atk2, Dcy1 and Rls2 rates to 0.
3.
Program the Atk1, Dcy2 and Rls1 segments as you wish. Decay 2 level is
4.
your Sustain level.
level
time
Key
Down
The filters make it possible to remove certain components of the sound. A
low pass filter removes the high frequency components or put another way,
it "lets the low frequencies pass." A high-pass filter removes the low
frequency components from the sound letting only the high frequencies
pass. See "XK-6 Filter Types" on page 148 for a complete list of XK-6's filters
and their descriptions.
In preparation for the next tutorial, set up the XK-6 with a single
instrument layer on Layer 1.
Go to the Instrument screen (Preset Edit menu) and select Instrument
1.
#124 - Interference. This is a harmonically rich sound. Since filters
work by removing or accentuating certain frequencies, we want to
make sure that we have a lot of frequencies to start with.
Advance to the Filter Type screen using the data entry control. Select
1.
the Classic 4th order filter.
L1
FILTER
Classic
The Filter Frequency and Q (resonance) are preprogrammed to the front
1.
panel controller knobs A & B. This is the easiest way to change the
volume envelope settings.
Press the front panel Controller button A-D to select controls A-D
2.
The Frequency parameter determines the filter cutoff frequency or the
frequency the filter uses as the highest frequency allowed to pass. If you
play the keyboard now, you should hear the raw sound. Slowly decrease
the filter cutoff frequency value as you play the keyboard. The sound
Used
Atk1
Dcy2
Rls1
Sustain
Level
Key
Released
Ord Type
4 LPF
Preset Programming
Editing Presets
Unused
Atk2
Dcy1
Rls2