Using an Envelope to Control Amplitude

Let's use an envelope to control the amplitude of a sine wave. To do this, we must connect the "output" port of the envelope to the "amplitude" port of the sine wave oscillator.

    myEnvPlayer.output.connect( sineOsc.amplitude );

This applet has two buttons. The "Queue" button queues the envelope to the envelopePort. The "Clear" button clears that port.

To Do:

• Hit the "Queue" button. Notice that the amplitude has a sudden rise and a gradual fall just like we defined.
• Hit the "Queue" button several times as quickly as possible. Listen to one envelope start when the previous envelope in the queue finishes.
• Hit the "Clear" button. Notice that the amplitude freezes at the current level.
• Hit the "Queue" button again and notice that there is no pop when the envelope starts.

Here is the source code for this program.

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