local audioChannel, otherAudioChannel, currentSong, curAudio, prevAudio = 1
audio.crossFadeBackground = function (path, force)
        local musicPath = path
        if currentSong == musicPath and audio.getVolume{channel = audioChannel} > 0.1 and not force then return false end
        audio.fadeOut({channel=audioChannel, time=1000})
        if audioChannel==1 then audioChannel,otherAudioChannel=2,1 else audioChannel,otherAudioChannel=1,2 end
        audio.setVolume( 1, {channel = audioChannel})
        curAudio = audio.loadStream( musicPath )
        audio.play(curAudio, {channel=audioChannel, loops=-1, fadein=1000})
        prevAudio = curAudio
        currentSong = musicPath
        audio.currentBackgroundChannel = audioChannel
end
audio.reserveChannels(2)
audio.currentBackgroundChannel = 1