Sending audio volume level through command line

Hi, My question and request is related to command line usage through front ends! RetroArch already allows to set a ‘fullscreen’ option with command line. Would it be possible to set audio volume through commandline too? (like mame/mess do) I can see that there’s such a parameter (audio_volume =) in retroarch.cfg but would like to be able to use it with a command line

Thanks!!