From http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules#module-jackdbus-detect I should be able to set auto connect and number of channels. I am testing this on UbuntuStudio 13.04 Alpha. Pulseaudio 2.1. In /etc/pulse/default.pa: load-module module-jackdbus-detect connect=no works as expected, but: load-module module-jackdbus-detect channels=2 Gives: Jan 31 15:43:02 studio1304 pulseaudio[6338]: [pulseaudio] module-jackdbus-detect.c: Failed to parse module arguments Jan 31 15:43:02 studio1304 pulseaudio[6338]: [pulseaudio] module.c: Failed to load module "module-jackdbus-detect" (argument: "channels=2"): initialization failed. Is my usage wrong? I have too old a version of pulseaudio? Hmm, pulseaudio --dump-modules -v gives: ---------------------------8<------------------ Name: module-jackdbus-detect Version: 2.1 Description: Adds JACK sink/source ports when JACK is started Author: David Henningsson Usage: connect=<connect ports?> Load Once: yes Path: /usr/lib/pulse-2.1/modules/module-jackdbus-detect -----------------------8<------------------------ Is there a later version of this module with channels? In any case, I would think a two channel default would make more sense, but then I am thinking from a (semi)pro use. The main use I have seen for running pulseaudio through Jack has been to mix skype/youtube audio for broadcasting purposes like streaming or podcast interviews. Most 7.1 uses would connect to the internal audio card or direct to alsa without Jack except for those using a firewire card. I have not seen any firewire cards set up for 7.1 most seem to be aimed at multi-track use. (again, in my limited experience) As an aside CPU use goes up with pulse connected to jack at low latency. More channels increases cpu use. Even with the current default of connecting to all jack devices, the ability to choose less channels would be helpful. -- Len Ovens www.OvenWerks.net
