There is an updated pull request by ofiala-a51 against master on the void-packages repository

https://github.com/ofiala-a51/void-packages mumble_add_portaudio
https://github.com/void-linux/void-packages/pull/26252

mumble: add sndio support via portaudio backend


A patch file from https://github.com/void-linux/void-packages/pull/26252.patch is attached