How to generate variation in amplitude?

I wonder if there is any plugin that enable audacity to generate whistle signal using more than one variation of amplitude. For ex:
a board where we could enter a long suite of different amplitudes and different durations for the same frequency.

thx

What’s the actual job? That may give us a hint where to go with this.
Koz

David Sky made a “Random Amplitude Modulation” plugin , see … http://wiki.audacityteam.org/wiki/Nyquist_Effect_Plug-ins#Random_Amplitude_Modulation

[ To answer your next question … http://wiki.audacityteam.org/wiki/Nyquist_Effect_Plug-ins#Random_Pitch_Modulation ]