Things I tried were to disable all audio enhancements, set audio quality to normal, delete 'Default.SystemConfig.Gbx', reinstall maniaplanet (from steam's Trackmania2 Lagoon download).
Can't run the debug version as steam pops up and complains: "An error occurred while updating (app configuration unavailable)".
I am on Windows 10 Pro 64bit.
halp
Here is the fix:
Electron wrote: ↑28 May 2019, 00:28 Do not install the OpenAL library from this site: https://www.openal.org/ It is completely obsolete/outdated.
According to the entries in the launcher, Nadeo uses instead a fork of the alternative implementation OpenAL Soft (https://openal-soft.org/).
The Win32 and Win64 binaries provided on this page export the same functions as the ones Nadeo has bundled with ManiaPlanet.
After renaming, they also work fine with Maniaplanet. So that they are not immediately replaced by the updater, you have to change their file date to the current date with a Touch utility.
Every few months I also have the problem that Maniaplanet doesn't output sound. I don't remember the cause anymore. Maybe it was an update of the Realtek audio driver or after I accidentally unplugged my headset again.
But the problem could always be solved with the Volume Mixer (SndVol.exe). The volume control for ManiaPlanet was set to zero. But you couldn't just push it up because it was strangely linked to the other controls. But somehow I managed to get everything back in sync, as you can see in the screenshot:
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