effect pan expand in Audacity

Bonjour à tous.
Je voudrais savoir s’il est possible d’obtenir l’effet de panoramique “pan expand” du logiciel Sound Forge avec un plug-in de Audacity. Dans un fichier stéréo, le son passe progressivement du canal gauche au canal droit, et vice versa.
Merci.
I would want to know if it is possible to obtain the effect of panoramic view " pan expand " of the software Sound Forge with a plug - in Audacity. In a stereo file, the sound passes gradually of the left channel in the right channel, and vice versa.
Thank you.

There is a plug-in called “Channel Mixer” that can make a stereo track “wider” or “narrower”.
It is available here: http://wiki.audacityteam.org/wiki/Nyquist_Effect_Plug-ins#Channel_Mixer
Installation instructions: http://wiki.audacityteam.org/wiki/Download_Nyquist_Plug-ins#Installing_Plug-ins