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I'd love if I could make a custom area that would progressively apply a basic EQ to the audio (instead of position mapping to gain, it would map to a wet/dry parameter), would be very cool to be able to "enter a building" by entering a nested area that maps to a low-pass filter.

The AppImage didn't work on my machine, so I tried various things like wine for the windows install, extracting/modifying the AppImage, etc. This is what I found works. (This is on an Arch system with dedicated AMD gpu, KDE Plasma/Wayland, systemd, pipewire).

Download the .deb file, extract .deb, you should have data.tar.gz, extract that, the resulting usr/bin/tat binary is the program.

Read through the libraries before running this command, this was a very crude transform on "ldd" output, which simply lists statically linked libraries of the tat binary, then scrubbed for redundant dependencies. You know your system, see if anything will not be applicable or if you need any additional compatibility layers.

sudo pacman -Sy --needed aom at-spi2-core brotli bzip2 cairo dav1d dbus \
    e2fsprogs enchant expat fontconfig freetype2 fribidi gcc-libs gdk-pixbuf2 \
    glib2 glibc glycin graphite gstreamer gtk3 harfbuzz harfbuzz-icu hidapi \
    highway hyphen icu json-glib keyutils krb5 lcms2 libavif libcap libcloudproviders \
    libdatrie libdrm libelf libepoxy libevdev libffi libgcrypt libglvnd libgpg-error \
    libgudev libidn2 libjpeg-turbo libjxl libmanette libnghttp2 libpng libpsl \
    libseccomp libsecret libsoup3 libtasn1 libthai libunistring libunwind libwebp \
    libx11 libxau libxcb libxcomposite libxcursor libxdamage libxdmcp libxext libxfixes \
    libxi libxinerama libxkbcommon libxml2 libxrandr libxrender libxslt libyuv mesa openssl \
    orc pango pcre2 pixman rav1e sqlite svt-av1 systemd-libs tinysparql tpm2-tss util-linux-libs \
    wayland webkit2gtk-4.1 woff2 xz zlib-ng-compat zstd

Gstreamer Plugins (dynamic, picked up from trial/error debugging on the AppImage):

sudo pacman -Sy --needed gst-plugin-pipewire gst-libav

"gst-libav" is an AAC decoder, so it's technically optional if you're not using AAC files. If you're still having troubles, see if "gst-plugins-good", "gst-plugins-bad", "gst-plugins-ugly" are all installed. These libraries are dependencies for other things on my system, so I couldn't isolate if any of these packages are necessary, but I wouldn't be shocked if any/all are.