Version 0.6.3 is available upstream with significant bugfixes and improvements.
commit: 0ff1c8bbb92908cf8dc374e8358f3ebc6cfb8c9e URL: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=0ff1c8bb media-sound/qmidiarp: 0.6.3 version bump, fix configure w/ Qt 5.7