Bug 489297 - Reference on dB in gnome-volume-control-applet is misleading
Summary: Reference on dB in gnome-volume-control-applet is misleading
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: gnome-media
Version: rawhide
Hardware: All
OS: Linux
low
medium
Target Milestone: ---
Assignee: Bastien Nocera
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-03-09 12:00 UTC by Michal Nowak
Modified: 2013-03-08 02:05 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2009-03-12 15:36:34 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
100 % = -0.6 dB (7.57 KB, image/png)
2009-03-09 12:00 UTC, Michal Nowak
no flags Details
100 % = -4.38 dB (7.57 KB, image/png)
2009-03-09 12:14 UTC, Michal Nowak
no flags Details


Links
System ID Private Priority Status Summary Last Updated
GNOME Bugzilla 575093 0 None None None Never

Description Michal Nowak 2009-03-09 12:00:32 UTC
Created attachment 334498 [details]
100 % = -0.6 dB

Description of problem:

The same 100 % of output on the new applet sometimes means different value in dB. See the two attached images.

Version-Release number of selected component (if applicable):

gnome-media-2.25.92-2.fc11.x86_64

How reproducible:

always

Steps to Reproduce:
1. Have < 100 %
2. Do some up'n'down with the pop up slider and/or change the volume with mouse's second button (wheel)

Actual results:

dB differs: -0.6 dB v. -4.38 dB

Expected results:

dB are always the same on each percentage level

Comment 1 Michal Nowak 2009-03-09 12:14:11 UTC
Created attachment 334500 [details]
100 % = -4.38 dB

Comment 2 Bastien Nocera 2009-03-12 14:02:59 UTC
I'll double-check this. I presume it will be a bug in PulseAudio, but I have no proof of that yet.

Comment 3 Bastien Nocera 2009-03-12 15:36:34 UTC
It's a gnome-media bug. Upstream bug is at:
http://bugzilla.gnome.org/show_bug.cgi?id=575093

Fixed in gnome-media 2.25.92-4:
http://koji.fedoraproject.org/koji/taskinfo?taskID=1238143

Comment 4 Michael Monreal 2009-03-13 14:57:28 UTC
Is it correct that 100% equals 0.00db and 50% equals -30.00db? Maybe I'm totally misreading this but it makes no sense to me... (I just tested with the latest gnome-media from koji)

Comment 5 Bastien Nocera 2009-03-14 01:52:25 UTC
That's the way that dB information is used for soundcards.


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