Select next Audio track exclude folders

This should do it.
Make sure the video is selected before running the script - it doesn't need to be the first track.
The script will skip any audio track that has no audio in the selection;
Only tracks that are visible will be affected.
Also be sure that folders are closed if you don't want the audio within them to be muted,

sf.ui.proTools.appActivateMainWindow();

//Ensure Link Track and Edit Selection is enabled
sf.ui.proTools.menuClick({
    menuPath: ["Options", "Link Track and Edit Selection"],
    targetValue: "Enable"
});

//Get all visible track names
const origiVisibleTracks = sf.ui.proTools.visibleTrackNames;

//Cycle through each track name and…
origiVisibleTracks.forEach(track => {

    // Select track (which moves edit selection)
    sf.ui.proTools.trackSelectByName({ names: [track] });

    //Check if selected track is an Audio Track and skip if it isn't
    if (sf.ui.proTools.selectedTrack.title.invalidate().value.endsWith("Audio Track ")) {

        //Refresh PT menus by activating main window
        sf.ui.proTools.appActivateMainWindow();

        //check if audio is selected by checking if Separate Clip at Transients menu item exists
        if (sf.ui.proTools.getMenuItem("Edit", "Separate Clip", "At Transients").exists) {

            //If audio is selected, group audio
            sf.ui.proTools.getMenuItem("Clip", "Group").elementClick();

            //Mute audio
            sf.ui.proTools.getMenuItem("Edit", "Mute Clips").elementClick();
        }
    }
});
log("Finished!", "")