These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.96 s (backtrack: 0/20).

[ebuild  N     ] media-sound/shntool-3.0.10-r3::gentoo  USE="-alac -flac -mac -shorten -sox -wavpack" 211 KiB

Total: 1 package (1 new), Size of downloads: 211 KiB