One more question..Is there a way that I can output sound both on HDMI and headphone jack on RPi..At this moment I m using the audio_device = "hw:0,0" for hdmi and audio_device = "hw:0,1" to output from jack...but have to edit this each time to change audio....is there a way to output both at the same time like what Kodi does?
did you try by leaving empty that parameter? I never use pi's minijack so I rally don't know... by the way, you should be able to change between audio devices using retroarch settings menu.