Bug 451606

Summary: Very low volume sound recordings using gnome-sound-recorder
Product: [Fedora] Fedora Reporter: clifford snow <jcs>
Component: pulseaudioAssignee: Lennart Poettering <lpoetter>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 10CC: bogado, lkundrak
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Last Closed: 2009-02-25 03:50:11 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
System information
none
amixer -c0 output none

Description clifford snow 2008-06-16 03:35:09 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9b5) Gecko/2008043010 Fedora/3.0-0.60.beta5.fc9 Firefox/3.0b5

Description of problem:
When I attempt to use the built in mic in a Dell Inspiron 1525 the volume level is very low.  alsamixer shows the volume level at 100% for all devices.  I've played around with the gnome volume control trying looking for a configuration that produces normal sound levels with no success.  It doesn't matter which capture tracks are selected or which of the two mics.  The laptop has two mics, one analog the other digital.  Results are the same on both.  

Version-Release number of selected component (if applicable):
pulseaudio-0.9.10-1.fc9.x86_64

How reproducible:
Always


Steps to Reproduce:
1. Open gnome-sound-recorder
2. Record a test message
3. Play back the message

Actual Results:
The sound is at a very low level - almost inaudible.

Expected Results:
Sound levels should be at normal level.

Additional info:
attached is a file with outputs from lspci, dmesg, and /procs/asound/cards
Comment 1 clifford snow 2008-06-16 03:37:26 UTC 
Created attachment 309444 [details]
System information
Comment 2 Lennart Poettering 2008-08-06 13:37:00 UTC 
Please play around with alsamixer -c0!
Comment 3 Victor Bogado 2008-08-06 22:49:52 UTC 
(In reply to comment #2)
> Please play around with alsamixer -c0!

my alsamixer output states that every volume is at 100%
Comment 4 Victor Bogado 2008-08-06 22:53:44 UTC 
Created attachment 313650 [details]
amixer -c0 output
Comment 5 Lennart Poettering 2008-09-09 20:24:56 UTC 
If you try to record without PA, i.e. with arecord and then play back with aplay, does it work correctly, then?
Comment 6 Victor Bogado 2008-09-10 11:17:06 UTC 
It seems to me that the volume is as low as the gnome-sound-recorder, so I would guess that it has more to do with alsa and drivers then with PA.
Comment 7 Victor Bogado 2008-12-15 23:55:18 UTC 
Bumping the version to 10 as it still affects the F10 version
Comment 8 Victor Bogado 2008-12-15 23:56:14 UTC 
Should this bug component be changed to "alsa"?
Comment 9 Lennart Poettering 2009-02-25 03:50:11 UTC 
Ok, the story goes like this:

some sound cards record audio only in very low resolutions and store that in the LSBs of the PCM samples. To make this a usable signal for applications all samples need to be digitall amplified.

PA can do that just fine, however no volume control application actually exposed this, i.e. the end of the volume slider is at 100%. For digital amplification it should go much higher.

The version of gnome-volume-control now exposes digital amplificatin fr up to 60dB. This should fix all issues.