Create diyelectromusic-RPi400MIDIAudio.override

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hwconfig/diyelectromusic-RPi400MIDIAudio.override

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+# diyelectromusic Raspberry Pi 400 MIDI and Audio Module (RPi400MIDIAudio)
+# https://diyelectromusic.wordpress.com/2023/12/18/rpi-400-midi-and-audio-pcb-design/
+# https://diyelectromusic.wordpress.com/2023/12/18/rpi-400-midi-and-audio-pcb-build-guide/
+
+SoundDevice=i2s
+
+LCDEnabled=1
+SSD1306LCDI2CAddress=0x3C
+SSD1306LCDWidth=128
+SSD1306LCDHeight=32
+SSD1306LCDRotate=0
+SSD1306LCDMirror=0
+
+LCDColumns=20
+LCDRows=2
+
+ButtonPinPrev=0
+ButtonActionPrev=
+ButtonPinNext=0
+ButtonActionNext=
+ButtonPinBack=5
+ButtonActionBack=click
+ButtonPinSelect=11
+ButtonActionSelect=click
+ButtonPinHome=6
+ButtonActionHome=click
+ButtonPinShortcut=11
+
+EncoderEnabled=1
+EncoderPinClock=10
+EncoderPinData=9