2.[How can I find the audio output device IDs, required for settings in engine-core.ini?](#how-can-i-find-the-audio-output-device-ids-required-for-settings-in-engine-coreini)
3.[I have configured an audio device in my `engine-core.ini` but still hear no sound](#i-have-configured-an-audio-device-in-my-engine-coreini-but-still-hear-no-sound)
4.[I have configured an audio device in my `docker.engine-core.ini` but still hear no sound](#i-have-configured-an-audio-device-in-my-dockerengine-coreini-but-still-hear-no-sound)
5.[I'm getting [clock.wallclock_alsa:2] Error when starting output lineout: Failure("Error while setting open_pcm: No such file or directory")!**](#im-getting-clockwallclock_alsa2-error-when-starting-output-lineout-failureerror-while-setting-open_pcm-no-such-file-or-directory)
5.[I'm getting [clock.wallclock_alsa:2] Error when starting output lineout: Failure("Error while setting open_pcm: No such file or directory")!\*\*](#im-getting-clockwallclock_alsa2-error-when-starting-output-lineout-failureerror-while-setting-open_pcm-no-such-file-or-directory)
6.[How to solve 'Error when starting output output_lineout_0: Failure("Error while setting open_pcm: Device or resource busy")!'?](#how-to-solve-error-when-starting-output-output_lineout_0-failureerror-while-setting-open_pcm-device-or-resource-busy)
7.[How to avoid stutter, hangs, artifacts or in general glitchy sound?](#how-to-avoid-stutter-hangs-artifacts-or-in-general-glitchy-sound)
8.[Are there any commands to directly control the playout-server for development, debugging or testing?](#are-there-any-commands-to-directly-control-the-playout-server-for-development-debugging-or-testing)
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@@ -32,6 +31,7 @@ Check out the [Audio Device Configuration](docs/audio-device-configuration.md) p
## I have configured an audio device in my `engine-core.ini` but still hear no sound
To test if you device is able to output audio at all, independently from Engine Core, try executing `speaker-test`. Also checkout out the `-D` argument to test specific devices. If you system doesn't provided `speaker-test` you have to install or use your preferred way of testing also audio.
## I have configured an audio device in my `docker.engine-core.ini` but still hear no sound
If you are running Engine Core using Docker, run the aforementioned `speaker-test` from within your docker container by perform following:
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@@ -41,12 +41,11 @@ If you are running Engine Core using Docker, run the aforementioned `speaker-tes
3. Now run `speaker-test`. It that's working, you now know that your audio device is at least available from within Docker and you'll need to further check your Liquidsoap device configuration.
4. Next you can run `liquidsoap tests/test_alsa_default.liq`. This is a basic script which tries to play the supplied MP3 using the default ALSA device.
## I'm getting [clock.wallclock_alsa:2] Error when starting output lineout: Failure("Error while setting open_pcm: No such file or directory")!**
## I'm getting [clock.wallclock_alsa:2] Error when starting output lineout: Failure("Error while setting open_pcm: No such file or directory")!\*\*
Assure you have set the correct device ID. To do so check the aformentioned question. Check the audio interface configuration section in `engine-core.ini`. Verify if the default settings `input_device_0` and `output_device_0` are valid device IDs.
In case your are *not* running Engine Core within Docker, also check if your executing user (è.g. `engineuser`) belongs to the group `audio`.
In case your are _not_ running Engine Core within Docker, also check if your executing user (è.g. `engineuser`) belongs to the group `audio`.
## How to solve 'Error when starting output output_lineout_0: Failure("Error while setting open_pcm: Device or resource busy")!'?
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@@ -78,7 +77,7 @@ List all available channels
List all input channels connected to the mixer
`mixer.input`
`mixer.inputs`
Set the volume of mixer `input 0` to `100%`
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@@ -88,8 +87,7 @@ Push some audio file to the filesystem `in_filesystem_0`
