Low maximum volume with pulseaudio on kde

[Sérgio Basto]

On Thu, 2011-06-16 at 01:42 -0700, John Woodhouse wrote: 
> ----- Original Message -----
> 
> > From: Duncan <1i5t5.duncan at cox.net>
> > To: kde at mail.kde.org
> > Cc: 
> > Sent: Thursday, 16 June 2011, 1:33
> > Subject: [kde] Re: Low maximum volume with pulseaudio on kde
> > 
> > Sérgio Basto posted on Wed, 15 Jun 2011 23:04:26 +0100 as excerpted:
> > 
> >>  3rd - run on user env:
> >>  pulseaudio -vvv
> >> 
> >>  lets test with kmix I see on pulseaudio logs at maximum :
> >> 
> >>  D: alsa-sink.c: Requested volume: 0: 100% 1: 100%
> >>  D: alsa-sink.c: Got hardware volume: 0: 100% 1: 100%
> >>  D: alsa-sink.c: Calculated software volume: 0: 100% 1: 100%
> >>  (accurate-enough=yes)
> >> 
> >>  with gnome-control-center -> sound I see on pulseaudio logs at maximum :
> >> 
> >>  D: protocol-native.c: Client gnome-control-center changes volume of sink
> >>  alsa_output.pci-0000_00_1b.0.analog-stereo.
> >>  D: alsa-sink.c: Requested volume: 0: 153% 1: 153%
> >>  D: alsa-sink.c: Got hardware volume: 0: 100% 1: 100%
> >>  D: alsa-sink.c: Calculated software volume: 0: 153% 1: 153%
> >>  (accurate-enough=no)
> >> 
> >>  so how I put kmix also control "software volume" ?
> >>  thanks,
> > 
> > FWIW, the messages are coming in, but I don't do pulse-audio at all so 
> > can't help with it, my main machine plays (digital output, kmix doesn't 
> > do anything anyway) thru my home 5.1 system so has plenty of volume, and 
> > while my netbook sound is a bit soft, I'm not using it enough for that to 
> > have worried about it.
> > 
> > So at least here, not much I can suggest...  As it seems I'm one of the 
> > more active regulars as well as one of the more technically inclined 
> > regulars, unfortunately, the lack of response could well mean no one else 
> > has a clue either.
> > 
> > Meanwhile, while I don't know much about pulse audio, I do know a bit 
> > about audio in general and computer audio in general, and it seems to me 
> > that if pulse can be set to further boost volume in software, as we see 
> > gnome doing, there's a good chance that you can configure it to do so by 
> > default, regardless of the client used to control it.  But you'll likely 
> > have more luck researching either the pulse documentation or googling it, 
> > or asking on the pulse-audio lists or forums, which I presume they have 
> > tho I've no real idea, personally.  Barring someone stepping up here 
> > right away with more info, that's where I'd be looking next.  Try 
> > googling 
> > on the three terms "linux pulse gain" (without the quotes as that 
> > would 
> > try to match those specific words in that specific order).
> > 
> > I hope you find a working solution.
> > 
> > -- 
> > Duncan - List replies preferred.   No HTML msgs.
> > "Every nonfree program has a lord, a master --
> > and if you use the program, he is your master."  Richard Stallman
> > 

> I had a similar problem a long time ago. I never really got to the root of the problem as installing mplayer via cvs cured it. It's volume control altered sound levels in all apps. From this I suspect it's a layers of software problem and that there is a lower level volume control some where. I don't know what shell function can alter that.
> 
> Rather recently I have noticed that VLC plays things with more volume than other applications that use sound. That may be purely down to phonon back ends.
> 
> John

http://www.webupd8.org/2009/08/increase-maximum-sound-level-in-ubuntu.html
just today I get to here:
http://alsa.opensrc.org/How_to_use_softvol_to_control_the_master_volume
about mplayer 
http://www.webupd8.org/2009/08/increase-mplayer-soft-volume-to-300-in.html

thanks for replies 
-- 
Sérgio M. B.

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