Dear friends,
I am trying to create a quick action (activated by right click) for WAV to m4a conversion process: I discovered that quicktime player has an option File->Export as-> Audio only...->

I want to imitate the clicks on the menu but cannot "click" on the "Audio only..." while File and Export as are "clickable" via Applescript.

This is the script I am trying to run - the line with "->" gives an error System Events got an error: Can’t get menu item "Audio only..." of menu item "Export as" of menu "File" of menu bar 1 of process "QuickTime Player".:

Applescript:

on run {input, parameters}
   
   tell application "System Events"
       tell process "QuickTime Player"
           set frontmost to true
           click menu "File" of menu bar 1
           click menu item "Export as" of menu "File" of menu bar 1
           -> click menu item "Audio only..." of menu item "Export as" of its menu "File" of menu bar 1
           
           
       end tell
   end tell
   
   return input
end run

I will highly appreciate any ideas regarding the general task and the error in particular.
Thanks