Hearing an Envelope Sustain

Let's queue separate portions of an envelope for the attack and release portion of a sustaining note.

This applet has two buttons.
The "Attack" button queues the beginning of the envelope.
The "Release" button queues the ending of the envelope.

To Do:

• Hit the "Attack" button. Notice that the amplitude rises then holds steady at a high level..
• Hit the "Release" button. Notice that the sound dies away.

Here is the source code for this program.

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