How to dynamically mod vol of one track to match another

I am new to this forum but have been using Audacity for about 3 years. I am using ver. 2.0.1 with Win XP.
In April 2010 there was a series of posts under the subject: How to dynamically mod volume of one track to match another? It seemed to end abruptly on April 21, 2010. I would like to use a stereo audio track ( music and speech) to control the volume of another stereo track that is a series of tones that all have the same amplitude. Has there been a plug-in written to do this? Also is there documentation available based on the April 2010 posts.

Thanks for any help you can provide.

It seemed to end abruptly on April 21, 2010.

Possibly because we never got it to work? Successful threads usually end with wiki postings, confetti, alcoholic beverages and back thumping all around. Unsuccessful ones peter out and die.

Since I can’t think of a good way to do that, I’m going with there isn’t one. The problem isn’t telling the target track what to do. Anybody with a mouse and the Envelope tool can do that. The problem is deriving the loudness information from the hero track. There’s a whole festival of different ways to do that and they all work and sound different.

Also, somebody would have to write the connection between the two tracks.


There is no plug-in other than David Sky’s. David is no longer with us but if you want that rectimod plug-in I can upload it somewhere.

From my reading, the instructions on were at least partially working for stereo track and stereo control track. If the instructions are not correct, it is probably better to post in that topic and explain what the problem is. Steve is away but Trebor may be able to help.