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Emax Owners Manual
© 1986 E-mu Systems, Inc. Enhanced by The Emulator Archive 2001 Page 27
GUIDED TOUR #3: ANALOG PROCESSING
BACKGROUND
The Analog Processing module consists of several sound processing functions. Let’s start with the Filter
and VCA sections, as they are among the most important.
The VCA function contains eight VCA’s that control a sound’s amplitude envelope. The Filter function
contains eight VCF’s that control a sound’s timbre.
Make sure you have loaded In the Arco Strings dIsk and selected the Current Voice as specified In
Guided Tour #2 before proceeding. The display should show the Analog Processing Module
Identifier. If not, repeat Guided Tour #2.
WORKING WITH THE FILTER
1. You could activate the Filter Setup function directly by keying in 13. However, let’s investigate another
way to select the Filter function. Move the data slider to catalog the various Analog Processing
functions. When the display shows function 13, Filter Setup, press
ENTER
.
Changing Filter Cutoff Frequency
1. Refer
to
ANALOG PROCESSING 13
. The display should look like the one in Step 1 of
ANALOG
PROCESSING 13.
2. Play with the Cursor buttons (the left and right arrow buttons directly below the display). Note how
you can move the cursor under the various parameters to be adjusted. For now, move the cursor
under Fc.
3. Vary the data slider. Note how the numbers under Fc change. Lower numbers mean a lower filter
cutoff frequency (less high frequencies). Higher numbers mean a higher filter cutoff frequency
(more high frequencies). Observe how only the notes within the Current Voice are affected by the
slider setting. Note: You must re-trigger a note to hear any changes. Holding down a note and
playing the slider will not change the sound; you must play a note after changing the slider to hear
the results of changing the slider. This is true when making any changes to the sound, not just
while you’re in the Filter function or the Analog Processing module.
By the way, now might be a good time to mention that although we are changing the sounds in the Bank,
the sounds on the disk remain unchanged. This is because 1) we haven’t saved the Bank to disk and 2)
even if we tried to, the disk is write-protected and cannot be overwritten. Thus, you can fool around with
the Bank sounds as much as you want without having to worry about altering the original sounds on the
disk.
Changing Filter Q
1. Move the cursor under Q on the display. Vary the slider to change the sharpness of the sound;
higher numbers give a sharper sound. Again, this affects only the range of notes covered by the
Current Voice. Leave the Q at about 90 and proceed.
2. Move the cursor back to Fc and vary the data slider. Note how this produces a sort of wa-wa
effect (remember, you have to re- trigger the key to hear the results of changing the Q).
3. Now set Fc and Q to about 50. The range of notes covered by the Current Voice should sound
muted.
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