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

Calculating dependencies ... done!
Dependency resolution took 0.95 s (backtrack: 0/20).

[ebuild  N     ] net-misc/asterisk-moh-opsound-2.03-r1::gentoo  USE="gsm -alaw -g722 -g729 -siren7 -siren14 -sln16 -ulaw -wav" 1737 KiB

Total: 1 package (1 new), Size of downloads: 1737 KiB