Hearing an Envelope Sustain Loop

Let's queue an envelope loop to get a tremolo effect during the sustain portion of a note.

 This applet has three buttons.
The "Attack+Steady" button queues only the beginning of the envelope.
The "Attack+Wiggle" button queues the attack plus a wiggling sustain loop.
The "Release" button queues the ending of the envelope.

To Do:

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

Here is the source code for this program.

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