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Lately our mood turned into a quick live setup in the middle of the BBQ area with self-built devices: 4 split-stereo channels transmitted by 4 raspberry pi radio transmitters, received on 8 portable radios, mobile phones, tablets, … It is all working easily on usb-batteries with(out) a solar panel. A piece for green low voltage power and live musicians: let's go to Tempelhof and just play it! But how how how?

SDR = software defined radio