AudioStreamPlayer intermittently causes Process Time to spike during a single frame

[zilphy]

Godot version

v4.1.2.stable.official [399c9dc]

System information

Godot v4.1.2.stable - Windows 10.0.22621 - Vulkan (Compatibility) - NVIDIA GeForce RTX 3080 (NVIDIA; 31.0.15.3699) - 11th Gen Intel(R) Core(TM) i7-11700K @ 3.60GHz (16 Threads)

Issue description

AudioStreamPlayer intermittently causes a huge lag spike when playing music or other longer audio files after the scene is first loaded. There is a large increase in Process Time in the profiler as shown below. Usually this occurs between 20 - 30 seconds after the scene is loaded and only occurs once, if it does occur. The scene only contains a Node2D with an AudioStreamPlayer attached.

Steps to reproduce

1. Create new project
2. Create an AudioStreamPlayer Node
3. Set a longer audio file to the stream
4. Set the AudioStreamPlayer to Autoplay
5. Run the project and monitor the profiler
6. Wait 30 seconds at least for a process time spike
7. If the spike does not occur, repeat steps 5 - 6 until the spike is seen.

Minimal reproduction project

audio_bug.zip

[zilphy]

My apologies, this issue might be just with my PC. I updated/reinstalled my graphics drivers to the latest driver and the issue became much more manageable. The spike still occurs, but it's only 60ms instead of >1000ms, which doesn't break my project anymore.

Additionally I was still able to detect a spike even when I removed the AudioStreamPlayer from the scene in the project. So it might not be related to the AudioStreamPlayer at all in the end.