Channel Mixing?

Is there a way to mix the volumes of individual channels in a stereo track? A file I’m working on has very different volume levels in each channel, and I’d like to equalize them.

I’m running Audacity 2.0 in Mac OS X 10.7.3


There is a “Channel Mixer” plug-in available here:
It is a “Nyquist plug-in”.
Instructions for installing plug-ins here:

Alternatively you may be able to do what you need by just using the “Pan” track slider:

Perfect. Thanks so much!