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Using your Raspberry Pi - Setting up the sound | Raspberry ...
https://projects.raspberrypi.org/en/projects/raspberry-pi-using/4#:~:text=Your%20Raspberry%20Pi%20can%20either%20send%20sound%20to,use%20the%20HDMIor%20the%20AV%20Jackconnection%20for%20sound.
raspbian - How to enable sound on HDMI? - Raspberry Pi ...
https://raspberrypi.stackexchange.com/questions/32717/how-to-enable-sound-on-hdmi
There's another setting in your /boot/config.txt that affects sound: hdmi_group. If you want sound over HDMI, config.txt should have both: hdmi_group=1. hdmi_drive=2. You need them both set because hdmi_group=1 tells the kernel we are using CEA mode (for TV's, has sound) instead of DMT mode(for monitors, no sound) and hdmi_drive=2 tells the kernel to use HDMI if available. …
Raspberry Pi Documentation - Configuration
https://www.raspberrypi.com/documentation/configuration/audio-config.md
The Raspberry Pi has up to three audio output modes: HDMI 1 and 2, if present, and a headphone jack. You can switch between these modes at any time. If your HDMI monitor or TV has built-in speakers, the audio can be played over the HDMI cable, but you can switch it to a set of headphones or other speakers plugged into the headphone jack.
No Sound HDMI PI 400 - Raspberry Pi Forums
https://forums.raspberrypi.com/viewtopic.php?t=291052
If I play a sound file via cmd I get this output but no sound. pi@raspberrypi:~ $ sudo aplay /usr/share/sounds/alsa/Noise.wav. Playing WAVE '/usr/share/sounds/alsa/Noise.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono. I have …
Raspberry pi 3 No audio through HDMI - Forum - Raspberry ...
https://community.element14.com/products/raspberry-pi/f/forum/30257/raspberry-pi-3-no-audio-through-hdmi
This worked on Raspberry Pi 4 using noobs 3.2.0 on 8/9/2019 . Open a terminal . type: sudo leafpad . In leafpad click 'file' then click 'open' on the drop down menu . now click 'File System' Double click 'boot' Find the file 'config.txt' and open it . go down a few lines in 'config.txt' and find '#hdmi_drive=2' Remove the '#' so it reads 'hdmi_drive=2'
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