Thread: External sound card not producing sound in all the speaker

hi all,
i m using external sound card in desktop....., (the driver name c-media pci)...
i have 5.1 sound system connected sound card.... 3 input jack....to 3 seperate slots in external sound card.....

actually sound comes in 1 speaker......
how sound speakers.....

only center , rear-right speaker along sub-woofer producing sound.......the rear-right speaker louder center one.... can not hear sound other speakers........

and how can adjust separate volumes of individual speakers.....
please help...........


thanks in advance........

necessary info:---

aplay -l
----------output----------------------------------------------------------------------------------
*** list of playback hardware devices ****
card 0: cmi8738 [c-media cmi8738], device 0: cmi8738-mc6 [c-media pci dac/adc]
subdevices: 1/1
subdevice #0: subdevice #0
card 0: cmi8738 [c-media cmi8738], device 1: cmi8738-mc6 [c-media pci 2nd dac]
subdevices: 1/1
subdevice #0: subdevice #0
card 0: cmi8738 [c-media cmi8738], device 2: cmi8738-mc6 [c-media pci iec958]
subdevices: 1/1
subdevice #0: subdevice #0
card 1: intel [hda intel], device 0: alc883 analog [alc883 analog]
subdevices: 1/1
subdevice #0: subdevice #0
card 1: intel [hda intel], device 1: alc883 digital [alc883 digital]
subdevices: 1/1
subdevice #0: subdevice #0
----------------------------------------------------------------------------------------------------

help please....

code:

for in `lspci -nn | grep '04[80][13]' | awk '{print $1}'`; lspci -vvvs $i; done

[size=3]00:1b.0 audio device: intel corporation n10/ich 7 family high definition audio controller (rev 01)
subsystem: asustek computer inc. device 8249
control: i/o- mem+ busmaster+ speccycle- memwinv- vgasnoop- parerr- stepping- serr- fastb2b- disintx-
status: cap+ 66mhz- udf- fastb2b- parerr- devsel=fast >tabort- <tabort- <mabort- >serr- <perr- intx-
latency: 0, cache line size: 16 bytes
interrupt: pin routed irq 19
region 0: memory @ dfef8000 (64-bit, non-prefetchable) [size=16k]
capabilities: <access denied>
kernel driver in use: hda intel
kernel modules: snd-hda-intel

01:00.0 multimedia audio controller: c-media electronics inc cm8738 (rev 10)
subsystem: c-media electronics inc cm8738
control: i/o+ mem- busmaster+ speccycle- memwinv- vgasnoop- parerr- stepping- serr- fastb2b- disintx-
status: cap+ 66mhz- udf- fastb2b- parerr- devsel=medium >tabort- <tabort- <mabort- >serr- <perr- intx-
latency: 64 (500ns min, 6000ns max)
interrupt: pin routed irq 17
region 0: i/o ports @ c800
capabilities: <access denied>
kernel driver in use: c-media pci
kernel modules: snd-cmipci

run terminal command:

code:

alsamixer -c 0

and please post screenshot

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