Emax Owners Manual
© 1986 E-mu Systems, Inc. Enhanced by The Emulator Archive 2001 Page 28
Changing the Filter Cutoff Envelope
1. Let’s investigate the effects of envelope control over the filter sound. Move the cursor under Env
and use the slider to set a value of +40. This allows the envelope to control the filter cutoff
frequency. For more information on envelope control, see
ANALOG PROCESSING 14.
2. Now we need to change over to
ANALOG PROCESSING 14
. Press
ENTER
to exit from the
current function (see
GENERAL INSTRUCTIONS 3
), and the display will show the Module
Identifier.
3. Key in 14 to select the filter envelope parameters.
4. Move the cursor under A and vary the slider. With larger values, it will take more attack time for
the filter frequency to go from lowest to highest cutoff frequency. Refer to
ANALOG
PROCESSING 4
, vary the various envelope parameters, and observe the effect these changes
have on the sound.
5. Now let’s check out inverted envelopes. Set the envelope parameters as follows:
...and play and hold a chord. This is a non-inverting envelope in the sense that the envelope
increases the filter cutoff frequency above the initial cutoff. To select an inverting envelope, where
the cutoff decreases below the initial cutoff, exit Function 14 by pressing
ENTER
(this puts you
back at the Module Identifier), then key in 13.
6. We’re back at the familiar Filter Setup screen. Move the cursor under Env and select -40 to invert
the envelope. Note that the envelope effect is not all that noticeable when you play a chord. This
is because the envelope forces the cutoff frequency in a negative direction, and since the cutoff
frequency is already fairly low, it can’t go that much lower.
7. Now move the cursor under Fc and increase the cutoff frequency to around 90 or 100. The effect
will be far more noticeable since there will be more range available for the negative-going
envelope excursion.
8. If you feel like experimenting, play with the Trk control to affect the way the filter frequency tracks
the keyboard pitch (see
ANALOG PROCESSING 13).
9. Before proceeding with the Tour, set Fc=1 00, Q=00, Env=+00, and Trk=1 .00. Set the envelope
to A=01, H=01, D=01, S=32, and R=05. After entering these values, press
ENTER
to return to the
Module Identifier.
F: A H D S R
01 01 07 01 01
Содержание EMAX
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