local dfpwm = require("cc.audio.dfpwm")
local speaker = peripheral.find("speaker")

local decoder = dfpwm.make_decoder()

string.startswith = function(self, str)
    return self:find('^' .. str) ~= nil
end

while true do
    id, message = rednet.receive()

    if message:startswith("play_song") then
        while not speaker.playAudio(string.sub(message, 9, string.len(message))) do
            os.pullEvent("speaker_audio_empty")
        end
    end
end