Waldorf Blofeld Keyboard - Manual (Page 103)

Sound Synthesis Basics
103 Blofeld User´s Manual
Envelope Types in the Blofeld
ADSR Envelope
Most traditional synthesizers feature ADSR envelopes.
These envelopes are made up of four parameters that
determine their response: Attack, Decay, Sustain and
Release. The other
parameters of the Envelope section
have no function, so they can not be edited. The
following picture illustrates the structure of an ADSR
envelope:
ADSR Envelope
The envelope is started by pressing a key. It ascends to its
maximum value at the rate determined by the Attack
parameter. It then descends at the rate determined by the
Decay
value until it reaches the predetermined Sustain
value. It remains at this value until the key is released. The
envelope then descends to zero at the rate determined by
the Release parameter.
ADS1DS2R Envelope
A difficult name for an envelope that is quite easy to
understand. Besides the parameters an ADSR envelope
features, it offers an adjustable attack level and a second
Attack Decay
Sustain
Release
Key pressed Key released
Time
Level
100%