
28 Envelopes
Oberheim
You can change the OB-X8’s envelope shape characteristics per preset.
Enter Page 2 and scroll to Envelope Type. You can select OB-X/Xa or OB-8 to utilize
the particular shape characteristics of each legacy design. See “Chapter 3: Page 2
Parameters” on page 50 for more information about Page 2 parameters.
Filter Envelope Controls
Attack:
Sets the attack time of the envelope. The higher the setting, the
slower the attack time and the longer it takes for the filter to open from
the level set with the filter cutoff knob to the level set by the filter
modu
-
lation
amount. Percussive sounds typically have sharp (short) attacks.
Decay:
Sets the decay time of the envelope. After the filter frequency
completes its Attack stage and reaches the Modulation amount, the
Decay controls the rate in which the filter frequency will decay to the
Sustain level. The higher the setting, the longer the decay. Percussive
sounds, such as synth bass, typically have shorter decays (and a generous
amount of filter resonance).
Sustain:
Sets the filter cutoff frequency for the sustained portion of the
sound. The sound will stay at this filter frequency for as long as a note is
held on the keyboard.
Release:
Sets the release time of the envelope. This controls how
quickly the filter closes after a note is released.
To hear the effect of the Filter Envelope:
1. Recall the basic preset by holding down
write
and pressing
manual
.
The OB-X filter is selected by default.
2. Hold down a note and rotate the filter’s
frequency
knob to set it to
about 30% of the knob’s travel.
3. Play a note. At this point you may not hear anything because you’ve
closed the filter significantly.
4. Turn the Filter’s
modulation
knob to about 25% of the knob’s travel.
Play a note. Notice how the sound has changed. The Filter modulation
is controlling filter cutoff frequency by the amount you set with the
modulation
knob.
5. Set the Filter Envelope’s
sustain
to minimum.
Содержание OB-X8
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