For those using an LCD controller board to convert an Arcade1Up cabinet, instead of using the audio jack on the Raspberry Pi, use the audio out on the controller. There is a
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Amazon.com: VSDISPLAY HD-MI VGA DVI LCD Controller Board M.NT68676 Work for 23 inch 1920x1080 LED Backlight 30 pin LVDS Panel : LTM230HT09 LTM230HT10 LTM230HT11 LTM230HT12 : Electronics