how can i stop audio background when i go to other scene then play again when i come back?

this my code :

it works … the audio will stop when i go to other scene but when i come back with this scene theirs no playing music…


local bgMusic = audio.loadStream(“Playing.wav”)

local backgroundMusicChannel = audio.play( bgMusic, { loops=-1 }  )

function scene:exitScene( event )

    local group = self.view

audio.stop( backgroundMusicChannel )

end