FWIW, I'm on archlinux but experience the same issue (and I did so back
when I used ubuntu).
I thought I'd share that I could fix the crackling noise by disabling
realtime scheduling. Here's my daemon.conf which produces fine sound:
$ cat ~/.config/pulse/daemon.conf
default-sample-rate = 48000
Why, I've added SB X-Fi 1 line into my /usr/share/alsa/cards/USB-
Audio.conf but it hasn't given any effect.
Actually, how can sound cracking be connected with spdif output which
I'm not using?
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the main point is that your USB does not have any volume control , does
pulseaudio server implement software volume?
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https://bugs.launchpad.net/bugs/1051665
Title:
[USB-Audio - SB
Yes, it does, I can control the sound volume. And, indeed, e.g. in alsa-
mixer I don't see any lever to influence my sound card.
But again, how is sound volume control connected with sound problems?
And what possible ways could be to solve the problem?
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http://thread.gmane.org/gmane.comp.audio.pulseaudio.general/8354/focus=8372
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https://bugs.launchpad.net/bugs/1051665
Title:
[USB-Audio - SB X-Fi Surround 5.1 Pro, playback] Underruns,
Well, the guy changed the format. But where can it be changed?
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Title:
[USB-Audio - SB X-Fi Surround 5.1 Pro, playback] Underruns, dropouts
krokoziabla@music:1:~ speaker-test -D hw:1,0 -c 2 -t wav
speaker-test 1.0.25
Playback device is hw:1,0
Stream parameters are 48000Hz, S16_LE, 2 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 96 to 262144
Period size range from 48 to 131072
Using max buffer
I forgot that the last time I also had system level EQ on my Ubuntu
(http://www.webupd8.org/2011/04/system-wide-pulseaudio-equalizer.html).
I've installed it now and gathered verbose pulse logs once more. With
this plug-in the sound starts crackling more likely.
** Attachment added:
do the channel map correct when playing 5.1 on hw:0,0 or need to use
surround51:1 ?
do you get any sound from the optical spdif,or the device has any
hardware switch to select analog and optical ?
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Could you explain how the map should look like? I'm a bit confused. When
I ran speaker-test there were hw:1,0 and hw1:,1. For both of them I
could hear the sound clearly.
Actually I don't know which device I use usually when I listen to music.
Sorry, but I cannot answer your first question
since thereis a route table in surround5.1
do the female voice come out from the correct speaker ?
speaker-test -D hw:1,0 -c 6 - t wav -d
speaker-test -D hw:1,1 -c 6 - t wav -d
speaker-test -D surround51:1 -c 6 -t wav -d
USB-Audio.pcm.surround51.0 {
@args [ CARD ]
@args.CARD
speaker-test -D hw:1,0 -c 6 -t wav gave woman's voice from incorrect speakers.
speaker-test -D hw:1,1 -c 6 -t wav -d failed to execute:
krokoziabla@music:1:~/sandbit speaker-test -D hw:1,1 -c 6 -t wav -d
speaker-test 1.0.25
Playback device is hw:1,1
Stream parameters are 48000Hz, S16_LE, 6
http://ubuntuforums.org/showpost.php?p=9385594postcount=4
may be device 1 is also used for spdif on you x-fi pro,
so you need to define the device of iec958 and you have to send email to
alsa-de...@alsa-project.org about the name Pro or SB X-Fi or SB X-Fi
Surround 5.1 Pro
card 1: Pro [SB
After I had submitted the bug I replaced my Ubuntu with Windows 7. But
now, having got a response from you, I've installed Ubuntu again
alongside Windows. So the logs which I have attached may not correspond
a little to the info which I put in the problem description initially.
But the problem
launchpad has refused me to add two files simultaneously. Here is USB-
Audio.conf
** Attachment added: USB-Audio.conf
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1051665/+attachment/3415339/+files/USB-Audio.conf
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do device 0 use for analog (stereo and surround51) and device 1 for
digital optical spdif (iec958) ?
since the default device of iec958 is also zero in usb-audio.conf
post the output of alsa-info.sh
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At least I can see in System Settings - Sound that, indeed, I have two
devices: digital spdif and 5.1 analog surround (which actually I'm
using). But I'm not certain about their numbers.
alsa-info.sh returned me the following link:
try
speaker-test -D hw:1,0 -c 2 -t wav
speaker-test -D hw:1,0 -c 6 -t wav
speaker-test -D surround51 -c 6 -t wav
speaker-test -D hw:1,1 -c 2 -t wav
speaker-test -D iec958:1 -c 2 -t wav
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: alsa-driver (Ubuntu)
Status: New = Confirmed
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Title:
post the pulseaudio verbose log
https://wiki.ubuntu.com/PulseAudio/Log
card 1: Pro [SB X-Fi Surround 5.1 Pro], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 1: Pro [SB X-Fi Surround 5.1 Pro], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
Subdevice
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Title:
[USB-Audio - SB X-Fi Surround 5.1 Pro, playback] Underruns, dropouts
or crackling sound
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Title:
[USB-Audio - SB X-Fi Surround 5.1 Pro, playback] Underruns, dropouts
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