On Wed, 27.05.09 09:13, Jud Craft (craftjml at gmail.com) wrote: > > On Wed, May 27, 2009 at 5:07 AM, Colin Guthrie <gmane at colin.guthr.ie> wrote: > > The way I understand it, and apologies if I'm wrong here, is that Banshess > > want's 80% and it's the only app playing. In order to achieve that result, > > pulse does not scale the stream at all but sets the underlying hardware > > volume to 80% (but in dB's yada yada!). So the net result is I get sound at > > the right volume. > > Right, but you did not address an important detail of my example. > Keep reading... > > > Then another stream joins that wants 100% So, pulse will start scaling the > > Banshee stream to ensure it is scaled in software to 80%, and turn up the > > underlying hardware volume to 100%. Net result is that Banshee continues > > playing at the same level and sounds the same but the new stream can be > > louder. > > So far so good. When running Banshee (80%), and, say, Firefox (100%). > Main system volume is 100%. I am in agreement with your explanation > thus far. > > > > Now...for the catch. Mate, pleas just read those mails I wrote yesterday. > Close Firefox. Only Banshee runs. System volume has now dropped back > to 80% (hardware volume has been changed to 80% too), since that's > Banshee's volume. If you close ff (actually flash) PA will remember that it was at 100% of the device volume. > Now, increase the system volume to 100%. Banshee is now 100%. > > Then, turn back on Firefox and play a video. What should happen? > Since the Banshee : Firefox ratio was previously 0.8 : 1.0, my theory > was that Banshee should be pushed down to 80% and Firefox starts > playing at 100% (the system volume) again. > > However, when I tried it last night, they both stayed at 100%, and I > lost the relative volume difference between them. (This was with > flat-volumes enabled). Yes, PA restores flash's volume according to what it saved previously: to 100% of the device volume. > So when I changed Banshee to 100% when it was running alone, it > appears that Pulse forgot that Banshee-Firefox have an 0.8 : 1.0 > ratio. (Note, maybe this was a bug, and Pulse should have remembered. > I'm not sure, since I can't tell what's intentional and what might be > a bug, since I haven't figured out what "flat volumes" mean in terms > of user volume interaction. It didn't make sense to me that Pulse > forgot remember the ratio, but maybe that's how it's supposed to be.) PA is not storing stream volumes relative to each other but relative to the sink's refernce volume. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net http://0pointer.net/lennart/ GnuPG 0x1A015CC4
