http://ftp.de.debian.org/debian/pool/main/c/cynthiune.app/cynthiune.app_0.9.5-9.diff.gz http://packages.debian.org/sid/cynthiune.app Attaching a patch from Debian. Apply it and change depend to musepack? ( >=media-sound/musepack-tools-444 ).
Created attachment 213768 [details, diff] cynthiune-0.9.5-libmpcdec.patch Patch to convert Cynthiune from Musepack SV7 api to SV8 api
looks ok, feel free to fix the package in the tree
And tested here :) -r5 added to tree, it applies this bug patch instead of cynthiune-0.9.5-libmpcdecsv7.patch (with updated deps)