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turning off mic loopthrough

  • 21-01-2005 11:34am
    #1
    pickarooney
    Moderators, Arts Moderators Posts: 35,913 Mod ✭✭✭✭


    This may be quite an incoherent post, and for that I apologise in advance, for not only do I not know the solution, I'm also unsure of the problem.
    Breaking it down:

    What I want to do
    Run skype, to communicate with friends and family from PC to telephone.

    What's gone right
    Skype installed and configured, connection possible, communication also possible.

    What's not quite right
    The sound is, to put it vaguely, a bit cack. I have an onboard (C-Media) sound card, using ALSA (at least I think I am, it loads on bootup, any way to check this exactly?), quadrophonic speakers with two connected via the audio out (green) jack and two via the blue jack (aux/line-in). It's configured as such, so the sound comes out both ports. The pink jack is for the mic.
    Now... when I talk over skype, I can hear myself through the speakers (also tried with headphones, it's the same). This makes it very difficult to follow a normal conversation, and I think it might be weakening the sound signal to the recipient's phone. For reference, I've tried from another (Windows) PC, and there's no loopthrough and communication is close to crystal-clear.
    I've tried adjusting all the audio parameters I've found, mic boost, turning the speakers physically up and down, adjusting their sliders in one or other control panel etc. but I either get muffled sound or timpani-bursting feedback.

    After all that, my question is: what program to use, and what settings to pick so that I
    a) don't hear myself when speaking
    b) send the best signal possible
    c) avoid feedback

    In my audio controls toolbox I've 8 entries, for aRts, kmix, sound recorder and ll sorts of things. I don't know which settings take precedence, which are relevant...

    Using Mandrake 10.0 with KDE 3.3 and ALSA.

    Cheers,
    P


Comments

  • #2
    niallb
    Registered Users, Registered Users 2 Posts: 2,771 ✭✭✭niallb


    Check your mixer, it sounds like you've got "mix" or "pcm" as the selected recording.
    Try setting it specifically to 'mic' and it shouldn't get mixed in.
    Could be a weirdness in your particular card, but I doubt it.

    NiallB


  • #3
    pickarooney
    Moderators, Arts Moderators Posts: 35,913 Mod ✭✭✭✭pickarooney


    would that be aumix, kmix, gmix or something else?


  • #4
    pickarooney
    Moderators, Arts Moderators Posts: 35,913 Mod ✭✭✭✭pickarooney


    KMix and volume control settings are here:
    with mic boost on, the sound is just louder in the headphones.


  • #5
    Red Alert
    Hosted Moderators Posts: 7,486 ✭✭✭Red Alert


    turn off the mic in the "PLAYBACK" mixer section, leave it on in "RECORD" and make sure "MIC" is selected as the record source.


  • #6
    pickarooney
    Moderators, Arts Moderators Posts: 35,913 Mod ✭✭✭✭pickarooney


    Red Alert wrote:
    turn off the mic in the "PLAYBACK" mixer section, leave it on in "RECORD" and make sure "MIC" is selected as the record source.

    Can you tell me how exactly to access this option? I've been looking for days, and only managed to kill the 3rd and 4th speakers, which I can't seem to reactivate, and now there's constantly a fuzzy sound coming from the 1st and 3rd speakers.


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