Emax Owners Manual
© 1986 E-mu Systems, Inc. Enhanced by The Emulator Archive 2001 Page 100
Env: Varies the effect of the filter envelope (see ANALOG PROCESSING 14) on the filter
cutoff frequency from -50 (maximum inverted envelope) to +00 (no envelope) to +50
(maximum positive envelope). It is usually necessary to raise the fitter cutoff value
when using inverted envelopes (Fig. ANALOG-3).
Trk: Varies the fitter cutoff with respect to the note(s) being played on the keyboard from
0.00 (no tracking) to 1.87 (over tracking) filter-oct/keyboard-oct. With 0.00 tracking, the
keyboard pitch will not affect the filter cutoff. With 1.00 tracking, the filter cutoff will track
the keyboard pitch. With 1.87 tracking, the filter cutoff will change at almost twice as
fast a rate as keyboard pitch changes (Fig. ANALOG-4).
Keyboard tracking application: With no tracking, a voice will become progressively less bright as
you play higher on the keyboard. This is useful with some bass sounds, where you don’t want the
high notes to sound too trebly. With normal tracking (keyboard amount 1.00), the timbre of a voice
remains constant as you play up the keyboard. This generally gives the most realistic synthesizer and
instrument sounds. With over tracking (keyboard amount greater than 1.00), the overall timbre of the
voice becomes brighter as you play higher up on the keyboard. This is useful for playing upper
keyboard register leads that really “cut” while also playing a more sedate, muted line in the lower
registers.
2. After making your selections, press ENTER to return to the Module Identifier.
Module: ANALOG PROCESSING 14 Function: FILTER ENVELOPE
This function sets the attack, decay, sustain, and release characteristics of the filter AHDSR
envelope generator.
Application: Change the filter cutoff frequency dynamically with respect to time.
1. Activate ANALOG PROCESSING 14. The display will say:
..where XX is a two-digit numeral between 00 and 32.
Hint: Filter and VCA settings interact. For example, if the VCA is set for an extremely short decay
and 0 sustain level, then you won’t hear the effects of setting a long fitter decay.
2. Select the desired parameter for adjustment with the cursor buttons, then use the data slider to
change the parameter value. Fig. ANALOG-1 shows the effect and timing of the various envelope
parameters for the VCA; for the Filter, simply substitute the words “Filter Cutoff” for “Level”. Refer to
this figure as you read the following descriptions of the five parameters.
A (Attack): Varies the Fitter envelope attack time from 01 to 32 (higher values increase the attack
time).
H (Hold): Sets the duration of the peak attained during the attack phase. If a key is held down
longer than the hold duration, the decay phase will begin. If a key is released during the
hold duration, the release phase will begin (see Fig. ANALOG - 2, except substitute the
words “Filter Cutoff” for “Level”).
D (Decay): Varies the initial decay time from 01 to 32 (higher values increase the initial decay
time). A value of 32 gives “infinite decay” - the envelope stays at maximum amplitude
for as long as you hold down keys.
F: A H D S R
XX XX XX XX XX
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