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50 lines
2.4 KiB
Markdown
50 lines
2.4 KiB
Markdown
# PiKVM V3 Audio
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This feature allows you to receive audio over an HDMI cable and transmit it to the browser in WebRTC mode.
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!!! warning
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* This is only supported by PiKVM V3 devices right now. This may or may not work on other CSI devices as most have a hw defect.
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* Please note the feature is experimental. Nothing will explode for you, but something may not work. Please report about problems [here](https://discord.gg/bpmXfz5) (preferred) or [here](https://github.com/pikvm/pikvm/issues/97).
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* KVM switches may or may not work, we currently do not have a list of what works due to the feature being new/experimental.
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* MIC support is not supported at this time, it may be supported in the future.
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## Preparing
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1. Make sure that you have not removed the [jumpers related to audio (4)](v3.md#atx-connection) on the V3 board and have not deleted or commented out the `dtoverlay=tc358743-audio` line in `/boot/config.txt`. Return everything as it was, if you changed it.
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2. Update the OS:
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```
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# rw
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# pacman -Syu
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```
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3. Edit `/etc/kvmd/janus/janus.plugin.ustreamer.jcfg` and add the following lines at the end:
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```
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audio: {
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device = "hw:0,0"
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tc358743 = "/dev/kvmd-video"
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}
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```
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4. Enable the basic audio in the EDID:
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```
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# kvmd-edidconf --set-audio=yes
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```
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5. Reboot the device:
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```
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# reboot
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```
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6. Your host will detect the possibility of audio output via HDMI. Mac OS usually connects automatically, Windows requires manual indication, Linux will require a ritual shamanic dance. In any case, make sure that the audio is output via HDMI on your host. PiKVM supports stereo mode with any standard bits and frequencies like 32/44.1/48 kHz with 16/24 bit.
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7. Open the PiKVM Web UI. Click the **System** menu and switch the video mode to **H.264 / WebRTC**. After that, the volume slider will appear under the switch. Increase it to the maximum and have fun.
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!!! warning
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* After the page is reloaded, the audio slider will be reset. This is a technical limitation in all browsers to avoid annoying audio ads.
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* If something doesn't work, check the log: `journalctl -u kvmd-janus`.
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* Try a different browser, try and clear browser cache before reporting issues.
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* Unplug the hdmi cable and plug back in, either from the PiKVM end and or the target end.
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* Please report about problems [here](https://discord.gg/bpmXfz5) (preferred) or [here](https://github.com/pikvm/pikvm/issues).
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