Raspberry Pi configured with Charlie Laub's ACDf v3.0 DSP crossover driving pair of Klipsch KSF10.5 tower speakers through an Onkyo TX-SR605. Pi connects via HDMI to DVD input. Woofers driven by front channel. Mid driven by surround front channel. Tweeters driven by surround back channel. Generally used for listening to streaming internet radio, especially Radio paradise FLAC streams. Shout out to Jack Ruby for his Instructable!