Envelopes in PD
Temporal envelopes are an essential building block of sound synthesis algorithms. They are introduced in the Control Section of the CMB content:
http://ringbuffer.org/computer_music_basics/Control/envelopes-adsr/
http://ringbuffer.org/computer_music_basics/Control/envelopes-exponential/
ADSR in PD
The ADSR envelope is the most widely used temporal envelope. The PD help files contain an example, which can serve as a starting point for an ADSR object. It can also be downloaded here: ADSR
Once stored, the object can be used in custom patches to control
arbitrary parameters. The following example controls the gain of a
sine wave oscillator with an ADSR envelope.
The adsr object has six inlets:
1: the trigger
2: the peak value
3: the attack time (ms)
4: the decay time (ms)
5: the sustain amount (0...100%)
6: the release time (ms)
The delay object emulates a 555 ms key press. The only outlet is an
audio rate signal with the envelope:
