diff --git a/dev-libs/libcyaml/libcyaml-9999.ebuild b/dev-libs/libcyaml/libcyaml-9999.ebuild
new file mode 100644
index 0000000..8d4fd2f
--- /dev/null
+++ b/dev-libs/libcyaml/libcyaml-9999.ebuild
@@ -0,0 +1,27 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="8"
+
+inherit git-r3
+
+DESCRIPTION="C library for reading and writing YAML"
+HOMEPAGE="https://github.com/tlsa/libcyaml"
+
+EGIT_REPO_URI="https://github.com/tlsa/libcyaml.git"
+
+LICENSE="MIT"
+SLOT="0"
+
+src_compile() {
+	:
+}
+
+src_install() {
+	emake \
+		VARIANT=release \
+		PREFIX=/usr \
+		DESTDIR="${D}" \
+		LIBDIR=lib64 \
+		install
+}
diff --git a/media-sound/carla/carla-9999.ebuild b/media-sound/carla/carla-9999.ebuild
new file mode 100644
index 0000000..7b18641
--- /dev/null
+++ b/media-sound/carla/carla-9999.ebuild
@@ -0,0 +1,102 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{10,11} )
+inherit python-single-r1 xdg-utils
+
+DESCRIPTION="Fully-featured audio plugin host, supports many audio drivers and plugin formats"
+HOMEPAGE="http://kxstudio.linuxaudio.org/Applications:Carla"
+if [[ ${PV} == *9999 ]]; then
+	# Disable submodules to prevent external plugins from being built and installed
+	inherit git-r3
+	EGIT_REPO_URI="https://github.com/falkTX/Carla.git"
+	EGIT_SUBMODULES=()
+else
+	SRC_URI="https://github.com/falkTX/Carla/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+	RESTRICT="mirror"
+	KEYWORDS="~amd64"
+	S="${WORKDIR}/Carla-${PV}"
+fi
+LICENSE="GPL-2 LGPL-3"
+SLOT="0"
+
+IUSE="alsa gtk gtk2 opengl osc pulseaudio rdf sf2 sndfile X"
+REQUIRED_USE="${PYTHON_REQUIRED_USE}"
+
+	# $(python_gen_cond_dep 'dev-python/PyQt5[gui,opengl?,svg,widgets,${PYTHON_USEDEP}]')
+RDEPEND="${PYTHON_DEPS}
+	virtual/jack
+	alsa? ( media-libs/alsa-lib )
+	gtk? ( x11-libs/gtk+:3 )
+	gtk2? ( x11-libs/gtk+:2 )
+	osc? (
+		media-libs/liblo
+		media-libs/pyliblo
+	)
+	pulseaudio? ( media-libs/libpulse )
+	rdf? ( dev-python/rdflib )
+	sf2? ( media-sound/fluidsynth )
+	sndfile? ( media-libs/libsndfile )
+	X? ( x11-base/xorg-server )"
+DEPEND=${RDEPEND}
+
+src_prepare() {
+	sed -i -e "s|exec \$PYTHON|exec ${PYTHON}|" \
+		data/carla \
+		data/carla-control \
+		data/carla-database \
+		data/carla-jack-multi \
+		data/carla-jack-single \
+		data/carla-patchbay \
+		data/carla-rack \
+		data/carla-settings || die "sed failed"
+	default
+}
+
+src_compile() {
+	myemakeargs=(
+		LIBDIR="/usr/$(get_libdir)"
+		SKIP_STRIPPING=true
+		HAVE_FFMPEG=false
+		HAVE_ZYN_DEPS=false
+		HAVE_ZYN_UI_DEPS=false
+		HAVE_QT4=false
+		HAVE_QT5=true
+		HAVE_PYQT5=false
+		DEFAULT_QT=5
+		HAVE_ALSA=$(usex alsa true false)
+		HAVE_FLUIDSYNTH=$(usex sf2 true false)
+		HAVE_GTK2=$(usex gtk2 true false)
+		HAVE_GTK3=$(usex gtk true false)
+		HAVE_LIBLO=$(usex osc true false)
+		HAVE_PULSEAUDIO=$(usex pulseaudio true false)
+		HAVE_SNDFILE=$(usex sndfile true false)
+		HAVE_X11=$(usex X true false)
+	)
+
+	# Print which options are enabled/disabled
+	make features PREFIX="/usr" "${myemakeargs[@]}"
+
+	emake PREFIX="/usr" "${myemakeargs[@]}"
+}
+
+src_install() {
+	emake DESTDIR="${D}" PREFIX="/usr" "${myemakeargs[@]}" install
+	if ! use osc; then
+		find "${D}/usr" -iname "carla-control*" | xargs rm
+	fi
+}
+
+pkg_postinst() {
+	xdg_mimeinfo_database_update
+	xdg_desktop_database_update
+	xdg_icon_cache_update
+}
+
+pkg_postrm() {
+	xdg_mimeinfo_database_update
+	xdg_desktop_database_update
+	xdg_icon_cache_update
+}
diff --git a/media-sound/zrythm/zrythm-9999.ebuild b/media-sound/zrythm/zrythm-9999.ebuild
new file mode 100644
index 0000000..a44f903
--- /dev/null
+++ b/media-sound/zrythm/zrythm-9999.ebuild
@@ -0,0 +1,52 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit git-r3 meson
+
+DESCRIPTION="A highly automated and intuitive digital audio
+workstation"
+HOMEPAGE="https://www.zrythm.org/en/index.html"
+EGIT_REPO_URI="https://gitlab.zrythm.org/zrythm/zrythm.git"
+EGIT_BRANCH="v1"
+
+LICENSE="GPL-3"
+SLOT="0"
+
+IUSE=""
+REQUIRED_USE=""
+
+
+RDEPEND="
+	dev-scheme/guile:2.2
+	media-libs/soxr
+	gui-libs/libpanel
+	gui-libs/libadwaita[vala]
+	media-libs/lv2
+	dev-libs/sord
+	media-libs/sratom
+	media-libs/lilv
+	sci-libs/fftw[threads]
+	gui-libs/gtksourceview
+	media-sound/carla
+	media-libs/vamp-plugin-sdk
+	media-libs/rubberband
+	sys-libs/libbacktrace
+"
+DEPEND="${RDEPEND}"
+# S="${WORKDIR}/${P}"
+
+
+src_configure() {
+	local emesonargs=(
+		-Dx11=disabled
+	)
+
+	meson_src_configure
+}
+#
+# src_install() {
+# 	meson_src_install
+# 	rm -r ${D}/usr/share/doc/vala-panel-appmenu
+# }
diff --git a/metadata/md5-cache/dev-libs/libcyaml-9999 b/metadata/md5-cache/dev-libs/libcyaml-9999
new file mode 100644
index 0000000..9dd62ac
--- /dev/null
+++ b/metadata/md5-cache/dev-libs/libcyaml-9999
@@ -0,0 +1,11 @@
+BDEPEND=>=dev-vcs/git-1.8.2.1[curl]
+DEFINED_PHASES=compile install unpack
+DESCRIPTION=C library for reading and writing YAML
+EAPI=8
+HOMEPAGE=https://github.com/tlsa/libcyaml
+INHERIT=git-r3
+LICENSE=MIT
+PROPERTIES=live
+SLOT=0
+_eclasses_=git-r3	875eb471682d3e1f18da124be97dcc81
+_md5_=ba247ac635f6facd07044a99cac69f7c
diff --git a/metadata/md5-cache/media-sound/carla-9999 b/metadata/md5-cache/media-sound/carla-9999
new file mode 100644
index 0000000..ce26a0e
--- /dev/null
+++ b/metadata/md5-cache/media-sound/carla-9999
@@ -0,0 +1,15 @@
+BDEPEND=>=dev-vcs/git-1.8.2.1[curl]
+DEFINED_PHASES=compile install postinst postrm prepare setup unpack
+DEPEND=python_single_target_python3_10? ( dev-lang/python:3.10 ) python_single_target_python3_11? ( dev-lang/python:3.11 ) virtual/jack alsa? ( media-libs/alsa-lib ) gtk? ( x11-libs/gtk+:3 ) gtk2? ( x11-libs/gtk+:2 ) osc? ( media-libs/liblo media-libs/pyliblo ) pulseaudio? ( media-libs/libpulse ) rdf? ( dev-python/rdflib ) sf2? ( media-sound/fluidsynth ) sndfile? ( media-libs/libsndfile ) X? ( x11-base/xorg-server )
+DESCRIPTION=Fully-featured audio plugin host, supports many audio drivers and plugin formats
+EAPI=8
+HOMEPAGE=http://kxstudio.linuxaudio.org/Applications:Carla
+INHERIT=python-single-r1 xdg-utils git-r3
+IUSE=alsa gtk gtk2 opengl osc pulseaudio rdf sf2 sndfile X python_single_target_python3_10 python_single_target_python3_11
+LICENSE=GPL-2 LGPL-3
+PROPERTIES=live
+RDEPEND=python_single_target_python3_10? ( dev-lang/python:3.10 ) python_single_target_python3_11? ( dev-lang/python:3.11 ) virtual/jack alsa? ( media-libs/alsa-lib ) gtk? ( x11-libs/gtk+:3 ) gtk2? ( x11-libs/gtk+:2 ) osc? ( media-libs/liblo media-libs/pyliblo ) pulseaudio? ( media-libs/libpulse ) rdf? ( dev-python/rdflib ) sf2? ( media-sound/fluidsynth ) sndfile? ( media-libs/libsndfile ) X? ( x11-base/xorg-server )
+REQUIRED_USE=^^ ( python_single_target_python3_10 python_single_target_python3_11 )
+SLOT=0
+_eclasses_=multiprocessing	1e32df7deee68372153dca65f4a7c21f	toolchain-funcs	14648d8795f7779e11e1bc7cf08b7536	multilib	b2a329026f2e404e9e371097dda47f96	python-utils-r1	42c5abe4a656a4993a06a4fc61dbdd12	python-single-r1	47d8ac9be330c9366112b78fd4f8ce57	xdg-utils	42869b3c8d86a70ef3cf75165a395e09	git-r3	875eb471682d3e1f18da124be97dcc81
+_md5_=87546a8bc4734ef2613295cac1f0aad9
diff --git a/metadata/md5-cache/media-sound/zrythm-9999 b/metadata/md5-cache/media-sound/zrythm-9999
new file mode 100644
index 0000000..b615e64
--- /dev/null
+++ b/metadata/md5-cache/media-sound/zrythm-9999
@@ -0,0 +1,13 @@
+BDEPEND=>=dev-vcs/git-1.8.2.1[curl] >=dev-build/meson-1.2.3 app-alternatives/ninja dev-build/meson-format-array
+DEFINED_PHASES=compile configure install test unpack
+DEPEND=dev-scheme/guile:2.2 media-libs/soxr gui-libs/libpanel gui-libs/libadwaita[vala] media-libs/lv2 dev-libs/sord media-libs/sratom media-libs/lilv sci-libs/fftw[threads] gui-libs/gtksourceview media-sound/carla media-libs/vamp-plugin-sdk media-libs/rubberband sys-libs/libbacktrace
+DESCRIPTION=A highly automated and intuitive digital audio workstation
+EAPI=8
+HOMEPAGE=https://www.zrythm.org/en/index.html
+INHERIT=git-r3 meson
+LICENSE=GPL-3
+PROPERTIES=live
+RDEPEND=dev-scheme/guile:2.2 media-libs/soxr gui-libs/libpanel gui-libs/libadwaita[vala] media-libs/lv2 dev-libs/sord media-libs/sratom media-libs/lilv sci-libs/fftw[threads] gui-libs/gtksourceview media-sound/carla media-libs/vamp-plugin-sdk media-libs/rubberband sys-libs/libbacktrace
+SLOT=0
+_eclasses_=git-r3	875eb471682d3e1f18da124be97dcc81	toolchain-funcs	14648d8795f7779e11e1bc7cf08b7536	multilib	b2a329026f2e404e9e371097dda47f96	flag-o-matic	357f1a896fbedcd06e5ce55419c49eb9	multiprocessing	1e32df7deee68372153dca65f4a7c21f	ninja-utils	2df4e452cea39a9ec8fb543ce059f8d6	python-utils-r1	42c5abe4a656a4993a06a4fc61dbdd12	meson	99466844dd8d4fcfb07578a76f5a9922
+_md5_=d95d76755766eb56da8360d635223f9f
diff --git a/metadata/md5-cache/sys-libs/libbacktrace-1.0_p20230329 b/metadata/md5-cache/sys-libs/libbacktrace-1.0_p20230329
new file mode 100644
index 0000000..19bb30d
--- /dev/null
+++ b/metadata/md5-cache/sys-libs/libbacktrace-1.0_p20230329
@@ -0,0 +1,14 @@
+BDEPEND=test? ( app-arch/xz-utils sys-libs/zlib ) >=app-portage/elt-patches-20240116 sys-devel/gnuconfig || ( >=dev-build/automake-1.17-r1:1.17 >=dev-build/automake-1.16.5:1.16 ) || ( >=dev-build/autoconf-2.72-r1:2.72 >=dev-build/autoconf-2.71-r6:2.71 ) >=dev-build/libtool-2.4.7-r3
+DEFINED_PHASES=configure install prepare
+DESCRIPTION=C library that may be linked into a C/C++ program to produce symbolic backtraces
+EAPI=8
+HOMEPAGE=https://github.com/ianlancetaylor/libbacktrace
+INHERIT=autotools
+IUSE=static-libs test
+KEYWORDS=~amd64 ~arm ~arm64 ~mips ~ppc64 ~riscv ~x86
+LICENSE=BSD
+RESTRICT=!test? ( test )
+SLOT=0
+SRC_URI=https://github.com/ianlancetaylor/libbacktrace/archive/cdb64b688dda93bbbacbc2b1ccf50ce9329d4748.tar.gz -> libbacktrace-1.0_p20230329.tar.gz https://github.com/ianlancetaylor/libbacktrace/commit/6674aadb6f2be925e89b253f1b380ecdbc69777b.patch?full_index=1 -> libbacktrace-libtool-no-wrap-tests.patch
+_eclasses_=gnuconfig	ddeb9f8caff1b5f71a09c75b7534df79	toolchain-funcs	14648d8795f7779e11e1bc7cf08b7536	multilib	b2a329026f2e404e9e371097dda47f96	libtool	6b28392a775f807c8be5fc7ec9a605b9	autotools	7d91cc798a8afd8f4e0c6e9587296ebe
+_md5_=fefbc3d38ffa30bac5177cf9ac4a312b
diff --git a/sys-libs/libbacktrace/Manifest b/sys-libs/libbacktrace/Manifest
new file mode 100644
index 0000000..9d863dd
--- /dev/null
+++ b/sys-libs/libbacktrace/Manifest
@@ -0,0 +1,2 @@
+DIST libbacktrace-1.0_p20230329.tar.gz 680548 BLAKE2B 486c5000f56e20838dac30260f59a94484e03114c394f71d6e45a5e809fd2cf7c0c97b80ad0cdffce6384dd42cce7b6673da2332f48f59538e9fcd3ca3590209 SHA512 32a56c43b36fb35207665389891c1afd47d21fb8856c7a5f8235d5447543dbbee4a416c2d7ba3e9af99b0ee7a989b1dc25f549f256ba32f1c6bcac0afc683977
+DIST libbacktrace-libtool-no-wrap-tests.patch 6591 BLAKE2B a63e35d1bf0cddb3fa47d65d7c1e06303c38f3ad3a47d278d392bceb7789e5285d03657a3431dad1414f2cc648b54ee1a329c9c9c6d5d2ab8a6bfdf2f44c9db6 SHA512 0c6534464122c9d2b6922007861e1afd5ea5b941c68ae7c4433b7109372a1c61007e3e7ff0fadc62d7b06f1acb06a9fb082df50ba3de31e520e2702c31f1a307
diff --git a/sys-libs/libbacktrace/libbacktrace-1.0_p20230329.ebuild b/sys-libs/libbacktrace/libbacktrace-1.0_p20230329.ebuild
new file mode 100644
index 0000000..a43d82e
--- /dev/null
+++ b/sys-libs/libbacktrace/libbacktrace-1.0_p20230329.ebuild
@@ -0,0 +1,45 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit autotools
+
+DESCRIPTION="C library that may be linked into a C/C++ program to produce symbolic backtraces"
+HOMEPAGE="https://github.com/ianlancetaylor/libbacktrace"
+COMMITHASH="cdb64b688dda93bbbacbc2b1ccf50ce9329d4748"
+SRC_URI="${HOMEPAGE}/archive/${COMMITHASH}.tar.gz -> ${P}.tar.gz
+	${HOMEPAGE}/commit/6674aadb6f2be925e89b253f1b380ecdbc69777b.patch?full_index=1 -> ${PN}-libtool-no-wrap-tests.patch"
+S="${WORKDIR}/${PN}-${COMMITHASH}"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~mips ~ppc64 ~riscv ~x86"
+IUSE="static-libs test"
+RESTRICT="!test? ( test )"
+
+PATCHES=(
+	"${DISTDIR}/${PN}-libtool-no-wrap-tests.patch"
+)
+
+BDEPEND="
+	test? (
+		app-arch/xz-utils
+		sys-libs/zlib
+	)
+"
+
+src_prepare() {
+	default
+	eautoreconf
+}
+
+src_configure() {
+	econf --enable-shared \
+		$(use_enable static{-libs,})
+}
+
+src_install() {
+	default
+	find "${D}" -name '*.la' -delete || die
+}