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Old 01-08-2012, 10:31 AM   #1
business_kid
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Microphone problems with SB600 /HP6715S


I had to reinstall 13.37 here and, as last time, my sb600 came up with no microphone. Now that's a big deal ATM, 'cos my daughter had a baby in Italy.

I ran into a brick wall with alsa this time and last. Last time I sorted it with the hda-analyzer.py script, farting away until the thing worked and then turning and tuning until I half liked what I heard.

This time it isn't coming together for me at all. I have microphone sound, but it's echoing. If I ring someone, they hear themselves back.

The output seems to be going through every mixer on the thing. The chip internals are vast - mixers, amplifiers, stereo paths, mono paths, for pcm, digital, capture, playback, mic boost, and audio in. The script graphs it but you get to see only 3x3 blocks.

In alsamixer, I have a whole pile of columns, but the one for Mic is in red with L & R above it and there's no column. Any suggestions? / ideas?

Thanks for reading this far.
 
Old 01-17-2012, 11:24 AM   #2
slac-in-the-box
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congratulations, grandpa...

i don't know how to fix the echo thing, but, when I use headphones, there is no echo on the other end... if I take headphones off, echo returns... I just live with that and use headphones when I chat

depending on what software you are chatting with, you may be able to experiment with audio codecs, and with software options for echo cancellation...

in alsamixer, my mic has a column showing the levels that moves up and down with the arrow keys, so if you don't have a way to set levels with alsamixer, then something is definitely screwy, and all I can think of is fresh install of alsa, freshly compiled with latest drivers from alsa-project.org... (and of course checking /var/log/messages and dmesg for alsa errors, and lsusb and lspci to verify that mic is found, etc.)
 
Old 01-18-2012, 03:54 AM   #3
business_kid
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Quote:
Originally Posted by slac-in-the-box View Post
i don't know how to fix the echo thing, but, when I use headphones, there is no echo on the other end... if I take headphones off, echo returns... I just live with that and use headphones when I chat
I have been forbidden the title of grandpa, because my wife feels she's far too young to be a grandmother, and I had better go along or start ducking :-).

If you're running an AMD SB600, I'd love your alsa config files - alsa.conf etc.
 
Old 01-18-2012, 10:00 AM   #4
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Quote:
Originally Posted by business_kid View Post
In alsamixer, I have a whole pile of columns, but the one for Mic is in red with L & R above it and there's no column. Any suggestions? / ideas?
In alsa at the top of the screen there is a possiblity to switch input/ouptput with F -keys (F4 and so on). Have you tried it?

BTW - Alsa, and AMD chip have problems with mic connected to a motherboard input (in my case, when i suspend my machine, than i don't have sound in mic after waking up - have to reset snd_hda_intel driver). Can you try mic for an usb?
 
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Old 01-18-2012, 10:57 AM   #5
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Quote:
Originally Posted by firekage View Post
In alsa at the top of the screen there is a possiblity to switch input/ouptput with F -keys (F4 and so on). Have you tried it?

BTW - Alsa, and AMD chip have problems with mic connected to a motherboard input (in my case, when i suspend my machine, than i don't have sound in mic after waking up - have to reset snd_hda_intel driver). Can you try mic for an usb?

Thanks for reply, firekage.
Yes, I have tried that stuff with F-4 etc. I usually just hit F5 and get "All". See the Screen shot.

You say you have to 'reset the snd-hda-intel driver' How? Forcibly unloading module? Does it come up right for you.

My only mic is external on some half-assed web cam - I have a microphone and earphone socket and I gather this hda_intel is about 6x6 of modules interconnected in the strangest of ways. Most of it is turned off, muted or connected to something that isn't listening. The actual stuff you hear goes through about 16 modules and I can get feedback between i/p and speakers, but no microphone output. It's very weird.
 
Old 01-19-2012, 07:49 AM   #6
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Quote:
Originally Posted by business_kid View Post
Thanks for reply, firekage.
See the Screen shot.
I don't see it right in this topic. Maybe i'm missing something.

Quote:
You say you have to 'reset the snd-hda-intel driver' How? Forcibly unloading module? Does it come up right for you.
I have to log off from KDE because in KDE even force unloading drivers doesen't help because while disabling it/removing there is a warning that" "snd-hda-intel is in use". After switching off from KDE i'm in terminal and here i can unload this driver by typing as a root user:

Code:
# rmmod snd_hda_intel
(also there is modprobe with switches but right now i don't remember if this is modprobe -r/d/wathever, i use rmmod for unload drivers and modprobe for loading)

After this i type:

Code:
# modprobe snd_hda_intel
and after typing i exit from root privileages by typing:

Code:
# exit
and i'm as a user:

Code:
~
Than typing:

Code:
~ startx
and i'm again in KDE with sound in my mic.

Quote:
My only mic is external on some half-assed web cam
Same here - in my case after waking up when i have plugged mic from usb camera, there is sound in mic after waking up from suspend.

Quote:
I have a microphone and earphone socket and I gather this hda_intel is about 6x6 of modules interconnected in the strangest of ways. Most of it is turned off, muted or connected to something that isn't listening. The actual stuff you hear goes through about 16 modules and I can get feedback between i/p and speakers, but no microphone output. It's very weird.
Maybe there is no output for usb mic, strange.
 
Old 01-20-2012, 03:48 AM   #7
business_kid
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Try again with the screenshot. I fluffed attaching it last time. There is a mic input, there is a mic, everything works but the relevant channels do not exist in alsa.conf.

I'll have to have another go. I feel like Jimmy Durante looking for the Lost Chord.
Attached Images
File Type: jpg Screenshot.jpg (109.5 KB, 8 views)
 
Old 01-29-2012, 08:54 PM   #8
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If you are experiencing mic echo, turn off mic boost, and instead increase the mic capture level. On some microphones and audio chipsets, mic boost can be a bit much. Also, if you have "PCM CAPTURE" make sure that is muted - terrible echo otherwise.
 
Old 01-30-2012, 02:08 AM   #9
business_kid
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Thanks for the advice.
It's worse than that. To get anything I have to get in with a huge mess of chip legs and fiddle volumes. There's a number of ways to get noise, but only one right sound. The point in the alsamixer shot was that alsamixer knew there was a mic, but it wasn't there!

A reboot and the mic is gone.
 
Old 02-05-2012, 03:28 PM   #10
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business_kid, sorry for the delayed response, I was stuck on my stupid blackberry traveling for work.

Lets back up a bit. After a clean reboot, did you check dmesg, lsmod, lspci, syslog and message for any relevant hints such as errors, modules not loading etc.? Supposedly SB600 support is in alsa-1.0.1x and later via hda-intel module

Or, you can do what I did, despite the decade experience wrestling sound on various hardware, and disable the SB600 audio on the motherboard. I have a AMD64 X2 am2 RS690/SB600 motherboard and could not get sound to work reliably. After futzing and stabilizing output I got tired of the microphone disappearing and crackling when it did work. I picked up a Creative Labs SB Audigy (gold coated connectors!) for US$8 at a computer recycling nonprofit nearby. Works a hell of a lot better.
 
Old 02-06-2012, 02:32 AM   #11
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Everything loads fine. It's just that the microphone is not defined, so it never is configured. That's very much the impression I have
So it's never switched on and never appears. I forget how I sorted it last time, but I did sort it. I can't make changes hold over a reboot this time.I'm hardly likely to go the external route. Too much junk to carry with it as I stand.

/scratches head. I have a notion I used fedora config files for this in the distant past. I'll have to chase down in the backups to see if I have anything there.
 
  


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