We have found one software suitable in our database for this conversion.
Adobe Audition can export its own audio sessions (.sesx) to several audio formats, including the common MP3 format (.mp3).
Considering the support of .sesx sessions in other programs is pretty limited, it is unlikely that you can achieve sesx to mp3 conversion by other means.
Updated: June 6, 2023
SESX
Files with sesx extension are audio sessions saved in Adobe Audition. These files are basically audio projects used to edit audio data. When the project is finished, the appropriate audio resources are saved in one of the common audio formats, like MP3.
MP3
The mp3 file extension is traditionally used for one of the most common types of compressed audio files, MP3s, which you can playback using almost any media player.