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

Calculating dependencies ... done!
Dependency resolution took 1.75 s (backtrack: 0/20).

[ebuild  N     ] media-libs/alsa-topology-conf-1.2.5.1-r1::gentoo  USE="-verify-sig" 12 KiB
[ebuild  N     ] media-libs/alsa-ucm-conf-1.2.16.1::gentoo  USE="-verify-sig" 83 KiB
[ebuild  N     ] media-libs/libsamplerate-0.2.2::gentoo  USE="-test" 3242 KiB
[ebuild  N     ] x11-libs/libXcursor-1.2.3::gentoo  USE="-doc" 286 KiB
[ebuild  N     ] acct-group/realtime-0-r2::gentoo  0 KiB
[ebuild  N     ] sys-auth/realtime-base-0.1-r1::gentoo  0 KiB
[ebuild  N     ] media-libs/alsa-lib-1.2.16.1::gentoo  USE="python -debug -doc -verify-sig" PYTHON_SINGLE_TARGET="python3_14 -python3_12 -python3_13 (-python3_15)" 1104 KiB
[ebuild  N     ] media-libs/libsdl2-2.32.10::gentoo  USE="X alsa dbus haptic joystick opengl sound video (-aqua) (-custom-cflags) -doc -fcitx -gles1 -gles2 -ibus -jack -kms -libsamplerate -nas -oss -pipewire -pulseaudio -sndio -static-libs -test -udev -vulkan -wayland -xscreensaver" CPU_FLAGS_X86="mmx sse sse2 sse3 -3dnow" 7452 KiB
[ebuild  N     ] media-libs/libsdl-1.2.78::gentoo  USE="X alsa joystick opengl sound video -test" 487 KiB
[ebuild  N     ] media-libs/sdl-image-1.2.12_p20220527-r1::gentoo  USE="gif jpeg png tiff -static-libs -webp" 10634 KiB
[ebuild     U  ] dev-python/dbus-python-1.5.0::gentoo [1.4.0::gentoo] USE="-doc -examples -test" PYTHON_TARGETS="python3_14* -python3_12 -python3_13* (-python3_15) (-python3_11%)" 200 KiB
[ebuild  N     ] media-sound/jack2-1.9.22:2::gentoo  USE="alsa classic dbus pam tools -doc -ieee1394 -libsamplerate -metadata -opus (-systemd)" PYTHON_SINGLE_TARGET="python3_14 -python3_12 -python3_13" 943 KiB
[ebuild  N     ] virtual/jack-2::gentoo  0 KiB
[ebuild  N     ] media-sound/jack-example-tools-4::gentoo  USE="alsa readline -jack-net -jack-netsource -opus -sndfile -zalsa" 123 KiB
[ebuild  N     ] media-sound/meterbridge-0.9.3::gentoo  597 KiB

Total: 15 packages (1 upgrade, 14 new), Size of downloads: 25157 KiB