There is a new pull request by ulfw2020 against master on the void-packages repository

https://github.com/ulfw2020/void-packages qsynth-update
https://github.com/void-linux/void-packages/pull/27619

qsynth: update to 0.9.0.
adopt

A patch file from https://github.com/void-linux/void-packages/pull/27619.patch is attached