On Sat, 2015-12-12 at 20:42 +0000, hamann.w at t-online.de wrote: > Hi, > > imagine this situation: box A is sort of an entertainment station, and it is using PA for sound. > Now box B is an asterisk telephony server.  Now, when the phone rings, it would be great > to reduce the valume of sound or mute it, and restore when the phone is hung up. > Is there anything ready to use? > When googling for this subject, I saw sort of a complete gui remote control (reverb). > However, the telephony box will likely have neither graphics nor sound software installed If I understood correctly, you want to control the volume of box A from box B. You can do that by enabling network access on box A, configuring PulseAudio clients on box B to connect to box A and using pactl on box B to set the volume. How to enable network access on box A: Load module-native-protocol-tcp. If you're running pulseaudio in the system mode, load it in /etc/pulse/system.pa. If you're running pulseaudio in the user mode, copy /etc/pulse/default.pa to ~/.config/pulse/default.pa of the appropriate user and put the load command there (don't edit /etc/pulse/default.pa directly, because you don't want all users to try to accept network connections on the same TCP port). See https://wiki.freedesktop.org/www/Software/PulseAudio/Documentation/ User/Modules/ for information about various options that module-native- protocol-tcp accepts. For example, you may want to configure how authorization is done (or not done). How to configure PulseAudio clients on box B: Add "default-server = boxA" to ~/.config/pulse/client.conf of the appropriate user (or /etc/pulse/client.conf, if you want all users to share the same configuration). "boxA" can be either an IP address or a DNS name. If you enable cookie-based authorization (which is the default), you will have to copy the cookie from box A to ~/.config/pulse/cookie on box B for all users on box B that should be able to have access on box A. The cookie location on box A is ~/.config/pulse/cookie if pulseaudio runs in the user mode, and /var/lib/pulse/cookie if pulseaudio runs in the system mode. How to use pactl: See "man pactl". -- Tanu
