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#1 2014-01-14 23:34:41

dacrovinunghi
Member
Registered: 2012-10-13
Posts: 7

SoundCard 5.1 CMI8738-MC8 bad sound pitch (20% too fast)

Hello everyone,

I set up a 5.1 card. CMI8738-MC8
I configured 5.1 sound with alsa in my home directory
.asoundrc

pcm.!default {
type plug
slave.pcm 'surround51'
slave.channels 6
route_policy duplicate
}

I think all needed drivers are loaded

~ > lsmod

Module                  Size  Used by
snd_seq_midi            4104  0 
snd_seq_dummy           1099  0 
snd_seq_oss            25116  0 
snd_seq_midi_event      4484  2 snd_seq_oss,snd_seq_midi
snd_seq                41076  6 snd_seq_midi_event,snd_seq_oss,snd_seq_dummy,snd_seq_midi
snd_pcm_oss            33637  0 
snd_mixer_oss          12482  1 snd_pcm_oss
xts                     2439  2 
gf128mul                5666  1 xts
dm_crypt               12651  2 
dm_mod                 72585  5 dm_crypt
xfs                   716103  1 
crc32c                  1280  1 
libcrc32c                718  1 xfs
joydev                  7343  0 
hid_microsoft           2470  0 
hid_generic              753  0 
iTCO_wdt                4471  0 
gpio_ich                3504  0 
iTCO_vendor_support     1549  1 iTCO_wdt
ppdev                   6002  0 
microcode              10292  0 
evdev                   8564  6 
snd_cmipci             26275  2 
pcspkr                  1491  0 
psmouse                85751  0 
r8169                  51547  0 
serio_raw               3973  0 
i2c_i801                9909  0 
mii                     3411  1 r8169
snd_mpu401_uart         4819  1 snd_cmipci
snd_opl3_lib            7126  1 snd_cmipci
snd_hwdep               4750  1 snd_opl3_lib
gameport                6184  1 snd_cmipci
snd_rawmidi            14828  2 snd_mpu401_uart,snd_seq_midi
snd_seq_device          4256  6 snd_seq,snd_rawmidi,snd_seq_oss,snd_seq_dummy,snd_opl3_lib,snd_seq_midi
snd_pcm                63880  2 snd_pcm_oss,snd_cmipci
snd_page_alloc          5978  1 snd_pcm
snd_timer              14946  3 snd_pcm,snd_seq,snd_opl3_lib
snd                    44598  16 snd_pcm_oss,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_seq_oss,snd_mpu401_uart,snd_seq_device,snd_mixer_oss,snd_cmipci,snd_opl3_lib
soundcore               4386  1 snd
lpc_ich                11688  0 
shpchp                 22041  0 
intel_agp               8692  0 
intel_gtt              10204  1 intel_agp
parport_pc             16579  0 
parport                25369  2 ppdev,parport_pc
button                  3689  0 
w83627ehf              25758  0 
hwmon_vid               2380  1 w83627ehf
nvidia               9601131  49 
drm                   192945  2 nvidia
agpgart                22047  3 drm,intel_agp,intel_gtt
i2c_core               21458  3 drm,i2c_i801,nvidia
fuse                   65950  5 
coretemp                5282  0 
acpi_cpufreq            9495  0 
processor              22031  1 acpi_cpufreq
usbhid                 35860  0 
hid                    72270  3 hid_generic,hid_microsoft,usbhid
ext4                  430000  4 
crc16                   1095  1 ext4
mbcache                 4462  1 ext4
jbd2                   70317  1 ext4
usb_storage            37783  1 
sr_mod                 13055  0 
cdrom                  29900  1 sr_mod
sd_mod                 28329  11 
ata_generic             2438  0 
pata_acpi               2339  0 
ata_piix               20860  6 
uhci_hcd               21772  0 
libata                148931  3 pata_acpi,ata_generic,ata_piix
scsi_mod              110404  4 usb_storage,libata,sd_mod,sr_mod
ehci_pci                3280  0 
ehci_hcd               52640  1 ehci_pci
usbcore               154188  5 uhci_hcd,usb_storage,ehci_hcd,ehci_pci,usbhid
usb_common              1604  1 usbcore

I have a bad pitch sound, it's too quick
(sound rate 120% with chipmunk sound)

I first tried to set rate 48000 -> 44100 with no effect, so i think it's due to a bad pitch ?

Could some one help, please

Last edited by dacrovinunghi (2014-01-15 00:06:41)

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#2 2014-01-15 00:00:12

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: SoundCard 5.1 CMI8738-MC8 bad sound pitch (20% too fast)

Please edit your post.
When posting configs, code or command output, please use [ code ] tags https://bbs.archlinux.org/help.php#bbcode

like this

It makes the code more readable and - in case of longer listings - more convenient to scroll through.

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#3 2014-01-15 00:04:37

dacrovinunghi
Member
Registered: 2012-10-13
Posts: 7

Re: SoundCard 5.1 CMI8738-MC8 bad sound pitch (20% too fast)

done

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#4 2014-01-15 00:11:07

karol
Archivist
Registered: 2009-05-06
Posts: 25,440

Re: SoundCard 5.1 CMI8738-MC8 bad sound pitch (20% too fast)

Are all sounds too fast or e.g. just flash?
What happens if you remove the .asoundrc?

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#5 2014-01-15 00:16:36

dacrovinunghi
Member
Registered: 2012-10-13
Posts: 7

Re: SoundCard 5.1 CMI8738-MC8 bad sound pitch (20% too fast)

it's a perfect 5.1 sound but just 20% too fast with all application (flash, sdl, urban terror game, mplayer, mpg123 etc ..) ... If  i remove asound i switch to 2.1 sound (always 20% too fast); With vlc sounds squeaks

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