Describe the bug
When using audioplayer with sophisticated backpacks installed, the game crashes after a while of loading/walking around the world.
Mods: Sophisticated core, Sophisticated Backpacks, Sophisticated Storage, Audioplayer, Simple Voice Chat. (all fabric)

Crash log:
https://gist.github.com/TheMinecraftCatLover/e8dd94a323db6b43706745a7a97efb59

To Reproduce
Install Sophisticated Backpacks (Unofficial Fabric Port)-1.20.1-3.21.2.1.81 and Sophisticated Core (Unofficial Fabric Port)-1.20.1-1.0.8.1.119 alongside Audioplayer-1.8.9 and Simple Voice Chat-2.5.26
Load a world and it will crash due to a ticking entity after a short period of time.

Versions
Mod version that you're using. Version of fabric-loader and fabric-api may also be helpful in some cases
Minecraft 1.20.1
Fabric - 0.16.10
Fabric api - 0.92.3
Audioplayer - 1.8.9
Simple Voice Chat - 2.5.26

The log indicates that in Audioplayer 1.8.9 the CustomSound class does not exist anymore so I assume I have to update the compatibility.

As a workaround try to downgrade AudioPlayer and Simple Voice Chat.

I'll have a look at it.

Just remembered there is an open report for this already in #39 so I'll close this one here.

@TheMinecraftCatLover I spoke to soon you'll need a newer version instead of an older one so the newest AudioPlayer Beta should be working.
I'll include a min. version requirement in the next release.

@Salandora Thanks!