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Sound problems with saa7134 based tv-tuner
http://forum.linhes.org/viewtopic.php?f=2&t=8180		 Page 1 of 1
Author:  wmcyow [ Mon Jan 30, 2006 12:58 pm ]
Post subject:  Sound problems with saa7134 based tv-tuner
Good afternoon,


I am having trouble getting a quality audio signal from my saa7134 based tv-tuner. Currently I am using a loopback cabel from the card to the line-in on my sound card, however this is producing very poor quality sound. (lots of high pitched hissing).

I have tried to create /dev/dsp0 by including the
Code:
options oss=1
to the saa7134 moduels, but this is having no effect when the module is loaded. Here is the output from dmesg:


Code:
saa7130/34: v4l2 driver version 0.2.14 loaded
saa7130[0]: found at 0000:00:11.0, rev: 1, irq: 11, latency: 64, mmio: 0xcfffcc00
saa7130[0]: subsystem: 5168:0138, board: LifeView FlyVIDEO2000 [card=3,autodetected]
saa7130[0]: board init: gpio is 1f900
saa7130[0]: there are different flyvideo cards with different tuners
saa7130[0]: out there, you might have to use the tuner=<nr> insmod
saa7130[0]: option to override the default value.
saa7130[0]: registered input device for IR
saa7130[0]: i2c eeprom 00: 68 51 38 01 10 28 ff ff ff ff ff ff ff ff ff ff
saa7130[0]: i2c eeprom 10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
saa7130[0]: i2c eeprom 20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
saa7130[0]: i2c eeprom 30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
tuner (ivtv): chip found at addr 0xc2 i2c-bus saa7130[0]
tuner: type set to 39 (LG NTSC (newer TAPC series)) by saa7130[0]
tuner (ivtv): chip found at addr 0xc6 i2c-bus saa7130[0]
tuner: type set to 39 (LG NTSC (newer TAPC series)) by saa7130[0]
saa7130[0]: registered device video0 [v4l2]
saa7130[0]: registered device vbi0
saa7130[0]: registered device radio0
saa7146: register extension 'dvb'.
saa7146: register extension 'budget dvb'.
saa7146: register extension 'budget_ci dvb'.
saa7146: register extension 'budget_av'.



Does anyone have any ideas to either improve the quality of the audio via the line-in (the sound card is an onboard C-Media controller) or, enable the pci audio transfer option in the module?


thanks,


Bill
Author:  Gerryo [ Sun Feb 05, 2006 3:01 pm ]
Post subject:  Re: Sound problems with saa7134 based tv-tuner
wmcyow wrote:
Does anyone have any ideas to either improve the quality of the audio via the line-in (the sound card is an onboard C-Media controller) or, enable the pci audio transfer option in the module?

thanks,
Bill


I have a similar saa7134 card, but it has no eeprom.
I had sound problems, I found I had to adjust the Igain setting in the mixer to improve the sound.

Gerry
Author:  Martin1802 [ Thu Mar 23, 2006 10:30 am ]
Post subject:  same problems
Hi

having same problem ... using VIA EPIA M10000 board with Siemens DVB-C with analog module saa7146 based ...

onboard sound works ... dvb playback ... mp3 ... but could not get sound work for liveTV or recorded tv ... no sound played or recorded :-(

I tried your way with audio out to line in / aux ... select capture device ... tried "v4lctl ... volume mute off" ... read in other thread ... :-(

why is there no audio device ... no /dev/dsp ... no /dev/dvb/adapter0/audio0 working?

How to get more infos ... hope to get the problem solved?

-----------------------------------------
...
saa7146: register extension 'Multimedia eXtension Board'.
...
saa7146: register extension 'dvb'.
ACPI: PCI Interrupt 0000:00:14.0[A] -> Link [LNKB] -> GSI 5 (level, low) -> IRQ
5
saa7146: found saa7146 @ mem df2d0000 (revision 1, irq 5) (0x110a,0x0000).
DVB: registering new adapter (Fujitsu Siemens DVB-C).
adapter has MAC addr = 00:d0:5c:01:82:28
dvb-ttpci: gpioirq unknown type=0 len=0
dvb-ttpci: info @ card 0: firm f0240009, rtsl b0250018, vid 71010068, app 800026
1d
dvb-ttpci: firmware @ card 0 supports CI link layer interface
dvb-ttpci: DVB-C analog module @ card 0 detected, initializing MSP3400
saa7146_vv: saa7146 (0): registered device video0 [v4l2]
saa7146_vv: saa7146 (0): registered device vbi0 [v4l2]
DVB: registering frontend 0 (VLSI VES1820 DVB-C)...
input: DVB on-card IR receiver as /class/input/input3
dvb-ttpci: found av7110-0.
...

-----------------------------------------
Author:  esigal [ Wed Apr 12, 2006 10:16 pm ]
Post subject:  same issue
I also have a cheapie lifeview card, audio from CD's, etc works. tested xawtv and heard live tv sound. then followed posts for alsa -V. still no sound.
in myth setup in v4l /dev/dsp is selected. Alsa-default is not available and dod not take when i tried it.

Did anyone find a resolution, I have been reading tons of posts but not this particular issue.

thanks
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