Everything You Need to Know About AirTunes and Its Alternatives
Apple Airport Express USB Audio Output Mod | H i F i D U I N O
USB Powered Router / Airport Express 2nd Gen Mod - YouTube
Apple Airport Express USB Audio Output Mod | H i F i D U I N O
Sometimes it's the little things: the audio out jack on the AirPort Express glows red when you start playing music and there are no speakers plugged in : r/apple