An realtime EBU R128 loudness meter display for Behringer X32 audio mixing console (and other USB audio devices)
System requierements:
- Raspberry Pi 3
- Raspbian Jessie
Options:
- Raspberry LCD Touchscreen & Case
- Footswitch or other GPIO-Buttons
Settings:
/boot/config.txt:
dtparam=audio=on
enable_uart=0
#LCD Touchscreen display configuration
lcd_rotate=2
disable_touchscreen=1
#Disable useless wireless stuff
dtoverlay=pi3-disable-wifi
dtoverlay=pi3-disable-bt
#GPIO3 Shutdown/Reboot Button
dtoverlay=gpio-shutdown
#GPIO4 Quit/Reset Metering Button/Footswitch
dtoverlay=gpio-key,gpio=4,keycode=16,label="KEY_Q",gpio_pull=up
#GPIO17 Toogle screen Button/Footswitch
dtoverlay=gpio-key,gpio=17,keycode=17,label="KEY_W",gpio_pull=up
#GPIO25 Pause/Still/Freeze Button/Footswitch
dtoverlay=gpio-key,gpio=25,keycode=25,label="KEY_P",gpio_pull=up
/etc/apt/sources.list:
deb ftp://ftp.deb-multimedia.org jessie main
Prepare:
sudo systemctl disable dphys-swapfile
sudo systemctl disable hciuart.service