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angelcaf
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PostPosted: Thu Oct 18, 2007 4:21 pm    Post subject: Microphone problem Reply with quote

hi there,
i have a problem with my microphone,
i've installed alsa 1.0.14a-r1 and used it with skype and audacity...after
something wrong (i don't know) i can't use it.
I've tryed to set up mic settings with alsamixer or kmix but testing it with
audacity i've looked that the audio in receive the input signal
but this input is played with noise in output.
Also, i've noted that only high frequency signals are played (with noise) while other frequency
are such as filtered.
can anyone help me?

thank you in advance :wink:
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Dominique_71
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PostPosted: Thu Oct 18, 2007 7:08 pm    Post subject: Reply with quote

You must be more specific. How many sound card do you have inclusive external ones such as a webcam? Which sound cards? What is the output of
Code:
lsmod|grep snd


Be aware that some mixer can have missing or wrong control for some sound cards. In case of problem, always use alsamixer in a console.

This howtp contain a list of things you can try to diagnose your problem: Troubleshooting alsa
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angelcaf
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PostPosted: Mon Oct 22, 2007 10:06 pm    Post subject: Reply with quote

The output of
Code:
lsmod|grep snd
is:
Code:
snd_pcm_oss            38304  0
snd_mixer_oss          16896  1 snd_pcm_oss
snd_intel8x0           30620  0
snd_ac97_codec         91808  1 snd_intel8x0
ac97_bus                6144  1 snd_ac97_codec
snd_pcm                64772  3 snd_pcm_oss,snd_intel8x0,snd_ac97_codec
snd_timer              20228  1 snd_pcm
snd                    42468  6 snd_pcm_oss,snd_mixer_oss,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer
soundcore               9568  1 snd
snd_page_alloc         11400  2 snd_intel8x0,snd_pcm

I have just one sound card and it's integrated on my motherboard: asus P4P800SE
PS: my mic correctly worked, after something wrong it stopped to work.
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Dominique_71
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PostPosted: Tue Oct 23, 2007 9:47 pm    Post subject: Reply with quote

Did you try to remove the old ALSA state configuration as explained in the link in my first post?

If yes, I can only suggest you to search the alsa users email list for threads about the same hardware as yours. If you find nothing, you can consider to ask for help on this email list.
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Nephilim666
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PostPosted: Tue Oct 23, 2007 10:10 pm    Post subject: Reply with quote

Plz check your mixer settings again. I use alsamixer..

On the playback tab:

*) Master up
*) Mic Boost activated (press M)
*) AMic muted
*) Analog Mix up

On the capture tab:

*) Master up and Captur activated (press Space Bar)
*) Mic up and Captur activated (press Space Bar)
*) Analog Mix up

That did the trick for me. Hope this helps. ;)
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angelcaf
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PostPosted: Wed Oct 24, 2007 9:17 am    Post subject: Reply with quote

Dominique_71 wrote:
Did you try to remove the old ALSA state configuration as explained in the link in my first post?

If yes, I can only suggest you to search the alsa users email list for threads about the same hardware as yours. If you find nothing, you can consider to ask for help on this email list.


Yes i've tryed...but my mic still doesn't work...when i test it with audacity i try to register my voice but i can hear just a little noise when i blow, while when i speak i can't register nothing. :cry:
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scawa
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PostPosted: Thu Nov 01, 2007 12:42 pm    Post subject: Reply with quote

I've been on the forums of several versions of Linux (Ubuntu, SUse, Mandrake) and many people are having the same problem. Could this be a problem with the upgrade of alsa?
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angelcaf
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PostPosted: Fri Nov 02, 2007 12:01 pm    Post subject: Reply with quote

scawa wrote:
I've been on the forums of several versions of Linux (Ubuntu, SUse, Mandrake) and many people are having the same problem. Could this be a problem with the upgrade of alsa?


Maybe...actually i don't remeber if i've upgraded alsa before the problem
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Dominique_71
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PostPosted: Mon Nov 05, 2007 4:56 pm    Post subject: Reply with quote

It can append sometime when upgrading alsa that the controls or the control's name for your sound card are changing. At restart, alsa will notice this and start with new mixer values. Mixer like kmixer and other are know for having missing controls sometime. In case of problems, the first mixer to try is alsamixer in a console. Some mixer controls do have a mute associated control. press the space bar in that case. Other mixer controls do have separated mute controls, press the M key.
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