sound problem ??? cmedia distorted 48000khz??

eskuai · 01-10-2007, 06:08 PM

Hello,

I got a sound problem. Some files (using sample rate 48000khz) sounds very strange, like metalic, low volumen, like distorted sound.

I've read about this problem using my sound card, Cmedia 6501 7.1
but it is sound strange, because, it is works ok under winxp using the same vlc client.

My big problem is that files with sample rate to 48000 khz sounds distorted.

I think there is a problem with alsa version,
------------------------------------------------------------------------------------
[root@darkstar alsa]# rpm -qa | grep alsa
alsa-lib-devel-1.0.12-2.fc6
alsa-tools-1.0.12-4.fc6
alsa-lib-1.0.12-2.fc6
------------------------------------------------------------------------------------

i think that i should install a newest alsa package... howto do that ?, it is my
first time that i need to change something about sound (fc5 is works ok?)

Some info:
------------------------------------------------------------------------------------
[root@darkstar alsa]# modinfo soundcore
filename: /lib/modules/2.6.20-rc2.1.rt2.0064/kernel/sound/soundcore.ko
alias: char-major-14-*
license: GPL
author: Alan Cox
description: Core sound module
srcversion: 45750F13477CBA5B6F36F46
depends:
vermagic: 2.6.20-rc2.1.rt2.0064 SMP preempt mod_unload 686 REGPARM 4KSTACKS
------------------------------------------------------------------------------------
[root@darkstar alsa]# cat /proc/asound/cards
0 [default ]: USB-Audio - PnP Audio Device
PnP Audio Device at usb-0000:00:02.1-4, full speed
[root@darkstar alsa]#
------------------------------------------------------------------------------------
[root@darkstar ~]# lsmod | grep snd
snd_intel8x0 36445 0
snd_ac97_codec 95073 1 snd_intel8x0
snd_ac97_bus 6593 1 snd_ac97_codec
snd_usb_audio 78785 1
snd_seq_dummy 8133 0
snd_seq_oss 37185 0
snd_seq_midi_event 11841 1 snd_seq_oss
snd_seq 57137 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss 46561 0
snd_mixer_oss 20545 1 snd_pcm_oss
snd_pcm 80325 4 snd_intel8x0,snd_ac97_codec,snd_usb_audio,snd_pcm_ oss
snd_timer 27077 2 snd_seq,snd_pcm
snd_page_alloc 14281 2 snd_intel8x0,snd_pcm
snd_usb_lib 21057 1 snd_usb_audio
snd_rawmidi 28737 1 snd_usb_lib
snd_seq_device 12621 4 snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd_hwdep 13765 1 snd_usb_audio
snd 57029 14 snd_intel8x0,snd_ac97_codec,snd_usb_audio,snd_seq_ oss,snd_seq,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_ timer,snd_rawmidi,snd_seq_device,snd_hwdep
soundcore 14113 1 snd
[root@darkstar ~]#
------------------------------------------------------------------------------------

It is so strange, system-config-sound dont detect any card, but alsamix shows the card, but it is very interesting, i only can change volume level using kmix, no way using xmms o xine
options ...

More info about config files:
----------------------------------------------------------------------------------------------
[root@darkstar alsa]# cat /etc/modprobe.conf
# ALSA portion
#alias char-major-116 snd
#alias snd-card-0 snd-usb-audio

alias char-major-116 snd
alias snd-card-0 snd-usb-audio

options snd-card-0 index=0
install snd-usb-audio /sbin/modprobe --ignore-install snd-usb-audio && /usr/sbin/alsactl restore >/dev/null 2>&1 || :
remove snd-usb-audio { /usr/sbin/alsactl store >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-usb-audio

# OSS/Free portion
alias char-major-14 soundcore
alias sound-slot-0 snd-card-0
# card #1
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
----------------------------------------------------------------------------------------------

What am i doing wrong ?

can i change alsa version to get a nre updated snd-usb driver ?

thank you

pd, sorry, forget about aadebug script output:

--------------------------------------------------------------------------------------------
[root@darkstar admin]# ./aadebug.sh
ALSA Audio Debug v0.1.0 - Sun Dec 31 01:35:08 CET 2006
http://alsa.opensrc.org/index.php?page=aadebug
http://www.gnu.org/licenses/gpl.txt

Kernel ----------------------------------------------------
Linux darkstar 2.6.20-rc2.1.rt2.0064 #0 SMP PREEMPT Thu Dec 28 16:33:32 CET 2006 i686 athlon i386 GNU/Linux

Loaded Modules --------------------------------------------
snd_usb_audio 81664 1
snd_seq_dummy 7940 0
snd_seq_oss 37348 0
snd_seq_midi_event 11776 1 snd_seq_oss
snd_seq 57196 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss 46976 0
snd_mixer_oss 20992 1 snd_pcm_oss
snd_pcm 82052 2 snd_usb_audio,snd_pcm_oss
snd_timer 26756 2 snd_seq,snd_pcm
snd_page_alloc 13960 1 snd_pcm
snd_usb_lib 20864 1 snd_usb_audio
snd_rawmidi 28544 1 snd_usb_lib
snd_seq_device 12300 4 snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd_hwdep 13700 1 snd_usb_audio
snd 58528 12 snd_usb_audio,snd_seq_oss,snd_seq,snd_pcm_oss,snd_ mixer_oss,snd_pcm,snd_timer,snd_rawmidi,snd_seq_de vice,snd_hwdep

Modprobe Conf ---------------------------------------------
#alias char-major-116 snd
#alias snd-card-0 snd-usb-audio
alias char-major-116 snd
alias snd-card-0 snd-usb-audio
options snd-card-0 index=0
install snd-usb-audio /sbin/modprobe --ignore-install snd-usb-audio && /usr/sbin/alsactl restore >/dev/null 2>&1 || :
remove snd-usb-audio { /usr/sbin/alsactl store >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-usb-audio
alias char-major-14 soundcore
alias sound-slot-0 snd-card-0
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
#alias sound-slot-1 ymfpci
#alias snd-card-0 snd-ymfpci
#options snd-card-0 index=0
#options snd-ymfpci index=0
#remove snd-ymfpci { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-ymfpci

Proc Asound -----------------------------------------------
Advanced Linux Sound Architecture Driver Version 1.0.14rc1 (Wed Dec 20 08:11:48 2006 UTC).
0 [default ]: USB-Audio - PnP Audio Device
PnP Audio Device at usb-0000:00:02.1-4, full speed
2: : timer
3: : sequencer
4: [ 0- 0]: digital audio playback
5: [ 0- 0]: digital audio capture
6: [ 0] : control
00-00: USB Audio : USB Audio : playback 1 : capture 1
Client info
cur clients : 3
peak clients : 4
max clients : 192

Client 0 : "System" [Kernel]
Port 0 : "Timer" (Rwe-)
Port 1 : "Announce" (R-e-)
Connecting To: 15:0
Client 14 : "Midi Through" [Kernel]
Port 0 : "Midi Through Port-0" (RWe-)
Client 15 : "OSS sequencer" [Kernel]
Port 0 : "Receiver" (-we-)
Connected From: 0:1

Dev Snd ---------------------------------------------------
controlC0 pcmC0D0c pcmC0D0p seq timer

CPU -------------------------------------------------------
model name : AMD Sempron(tm) Processor 3400+
cpu MHz : 1800.000

RAM -------------------------------------------------------
MemTotal: 1021000 kB
SwapTotal: 0 kB

Hardware --------------------------------------------------
00:00.0 Host bridge: nVidia Corporation nForce3 250Gb Host Bridge (rev a1)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control