ti, 2010-01-05 kello 18:02 +0100, Lennart Poettering kirjoitti: > On Tue, 05.01.10 18:37, Tanu Kaskinen (tanuk at iki.fi) wrote: > > Consider this scenario: > > > > Headphones' port volume is -10 dB. Speakers' port volume is also -10 dB. > > > > I use headphones, and set the volume to -15 dB, because that is good. > > Then I switch to the speakers. The volume is now a bit too low, so I > > turn it up to -10 dB. Then I switch back to the headphones. m-s-r > > doesn't do anything, because it thinks one stream volume is good for any > > output. But the end result is that now the music is coming 5 dB louder > > to my ears than what I want. > > > > Maybe you're going to argue that after switching to the speakers I > > should have changed the port volume instead of the stream volume. But if > > I know nothing about the flat volume logic, as would be the case for an > > ordinary user, it's much more likely that I'm just going to tweak the > > music player volume, which modifies the stream volume. > > Na. I already agreed that m-d-r needs to be aware of ports and > save/restore volume based on the port that is actually selected > (i.e. remember what I wrote about using $SINKNAME@$PORTNAME). All i > was arguing abvoe was that m-s-r does not to be aware of ports. > > m-d-r would then have to listen to port changes of a sink and > save/restore volume then. So the entire changes to m-d-r would be: > > 1) always save two entries for each sink/source: $SINKNAME and > $SINKNAME@$PORTNAME. Always restore $SINKNAME@$PORTNAME if it is > available, fallback to $SINKNAME. > > 2) also save/restore data when the port is changed for a sink: save > the settings for the old $SINKNAME@$SINKNAME@$PORTNAME and $SINKNAME, > then load the settins for the new $SINKNAME@$PORTNAME if that exists, > finally save it $SINKNAME again to store the new port. > > The changes for that should be fairly easy to implement. I fail to see how port volumes in m-d-r help in any way in my scenario. The sink/port reference volumes stay at -10 dB all the time so whatever m-d-r does, it isn't visible to the outside world. When switching back to the headphones, it's the job of m-s-r to restore the stream volume back to the -5 dB relative volume (actually I think that m-s-r should restore the absolute volume, but let's not go there yet). -- Tanu Kaskinen
