Hello. I can't find this simple applications in installation tree. This applications helps when you use more, than one sound card in system (because jack can working only with one card at same time) In old ebuild (media-sound/jack-audio-connection-kit) this applications exists. I think this is a regression.
I do not understand. Is there a missing dependency? Does a package fail to install?
Is a missing binaries after merge. alsa_in and alsa_out is a additional binaries, which building with application, but don't installing. If you will merge media-sound/jack-audio-connection-kit - you'll see this applications at /usr/bin/. jack2 build this binaries too, but portage not install they to system.
It's my mistake. alsa_in and alsa_out builded and installed if libsamplerate USE-flag enabled. It's not obviously by descriptions of use-flags.