Crackly set_bus_volume_db if adjusted in real-time

[mischiefaaron]

I did not find any duplicate issues.

Godot version:
3.3 stable, but should affect every 3.x version as I've this issue the whole time issues.

OS/device including version:
Using the GLES2 renderer, a Geforce GTX 750 Ti & Linux Mint 19.2
I doubt it's graphics related, however. It may be a Linux exclusive issue as far as I'm aware.

Issue description:
I had my program adjust the volume during run-time of a bus. It would either be delayed in changing the volume by a very noticeable amount or have a loud crackle as it tried to change it. To get around this I adjust the player's volume in real-time instead which causes no such issues.

Steps to reproduce:
Use set_bus_volume_db on a bus in real time. Have the volume go up and down while playing some music and you should also experience the issue.

Minimal reproduction project:
I will make one later to demonstrate the issue clearly, just cataloguing the issue from my own game.

[Calinou]

Duplicate of #32882.

[mischiefaaron]

I am sorry I did not find that existing issue.
I searched for "set_bus_volume_db" expecting it to catch this, but I'm learning now that it did not search the actual issues' thread contents or I searched wrong. I will remember this and be more thorough with my searching.

[Calinou]

but I'm learning now that it did not search the actual issues' thread contents or I searched wrong.

GitHub's search does search in issue contents, but it may fail on words that aren't whole words (otherwise, there would be too many false positives).