I noticed the mod does not work on 1.19.1. How feasible is it for support to be added?

Same here, I can’t wait to 1.19.1 support.
So I have wrote the patch and I’ll share my code.

does your instance crash while trying to launch it?

I've added support for Minecraft 1.19.2 and 1.19.1 in my fork of ExtraSounds.

I actually made this fix a few… weeks ago for private use but I may have uh… completely forgot to actually push and submit/publicise my changes as a PR (which is now PR #74). Oops. Better late than never though, I guess…?

The source code is freely available for those who want to see exactly what was changed, and/or those who prefer building their own binaries locally.

I've changed the version number to 2.3.1+1.19.2-1.19.1~akemi (plus the Git commit short SHA-1) in order to clearly differentiate it from the official upstream ExtraSounds versions.

※ IMPORTANT NOTE: Minecraft 1.19 is no longer supported with these changes. For more information, see PR #74.

If you're just a normal user (non-developer) who just wants to use ExtraSounds on 1.19.2/1.19.1 right this instant…

If you don't want to build ExtraSounds yourself, and you trust me / are comfortable running unofficial binaries from me, here's a prebuilt jar that you can just drop into your mods/ folder:

https://developer.akemi.ai/Minecraft/extrasounds-2.3.1+1.19.2-1.19.1~akemi-git-7a58d66.jar

Version released :)