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PulseAudio bus does not support "org.freedesktop.DBus ...
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/761
Summary I'm trying to inspect the PulseAudio bus (exposed by module-dbus-protocol) using multiple tools, including busctl, qdbus, and d-feet.All of them complain that they failed to invoke org.freedesktop.DBus.Hello, which I believe is a must according to the D-Bus spec.. environment
Contacting Pulse Audio over Dbus - Stack Overflow
https://stackoverflow.com/questions/13403314/contacting-pulse-audio-over-dbus
Ubuntu ships Pulse Audio without D-Bus support. To enable it put the following line at the end of file /etc/pulse/default.pa: load-module module-dbus-protocol. Restart Pulse Audio: pkill pulseaudio; pulseaudio. Solution found at pulseaudio-mixer-cli project which demonstrates how to use pulseaudio over D-Bus. Share.
Download – PulseAudio - freedesktop.org
https://www.freedesktop.org/wiki/Software/PulseAudio/Download/
Typically PulseAudio would be provided by your OS distribution. As PulseAudio forms part of what is typically preferred to as the plumbing layer of Linux userspace, it is a non-trivial job to integrate it fully to form a complete system. This is why we strongly encourage you to go via your distribution whenever possible. Source Code
D-Bus Interface – Developer Documentation – PulseAudio
https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Clients/DBus/
PulseAudio is a user daemon, not a session daemon, so the session bus is not a good match. This point is undermined by the fact that the discovery service is on the session bus - any problems related to the user/session mismatch affect also the discovery service. Open Questions Does it make sense for clients to save card names?
PulseAudio - Ubuntu Wiki
https://wiki.ubuntu.com/PulseAudio
PulseAudio is a sound server for POSIX and Win32 systems. A sound server is basically a proxy for your sound applications. It allows you to do advanced operations on your sound data as it passes between your application and your hardware.
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