On Tue, 2010-07-13 at 20:35 +0100, Colin Guthrie wrote: > Not sure on the status of python volumes, but git master now has a dbus > based protocol, and while I've not looked at it, I'd imagine it supports > per-channel volume control. With this in mind, it *may* be possible to > write a script based on dbus-send that would work, but I have to stress > that I've not looked at this at all. dbus-send won't work, because AFAIK dbus-send wants to talk a bus daemon, but the connection to PA is a peer-to-peer connection. That said, using the dbus bindings in python isn't terribly hard. In fact, I'd guess it's actually easier than calling dbus-send from python and parsing its output. PA's dbus api[1] does support setting individual channel volumes for streams (unless it's broken - I don't think anyone has ever tested that functionality), so from that point of view using the dbus protocol is a viable solution. The downsides: * It's probably very buggy. There are not many known bugs, but so far when anyone has used parts of the API that nobody else has used before, it has required fixing a couple bugs first. * The API is not frozen yet, and I guarantee that there will be incompatible changes, so if you use the API, you'll need to update your script when you update PA. [1] http://pulseaudio.org/wiki/DBusInterface -- Tanu Kaskinen
