RE: [GnomeMeeting-list] Bad echo

[Christopher Warner <zanee kernelcode com>]

On Tue, 2003-09-02 at 13:38, mark h aldous L-3com com wrote:
> My headsets may not be the highest quality, but they pretty good.  Even if I
> unplug the headset's earphones on the sending side and unplug the headset's
> microphone on the receiving side (and put dummy plugs in the now-empty
> jacks), and talk quietly in the microphone far away from the sending side's
> laptop (and from the receiving side's laptop), I still hear an echo on the
> receiving side that has pretty good fidelity.  And if my sender's igain
> setting is high or my receiver's pcm setting is high, then the echo repeats
> louder and louder until it is too loud to comfortably hear it.  (But only
> the person wearing the receiver's headset can hear any of this.)
> 
> I don't see how the headsets could be causing this echo, since only half of
> each is connected.  I fear that my laptops (or their sound cards) are
> intentionally routing what they receive as input back out as output, not due
> to any lack of electronic integrity but because they have been programmed to
> do so.
> 
> Has anyone seen anything like this?
> 
> Damien's suggestion of having a live test with someone using the IRC channel
> is a good one.  Also, if the problem is with the sound card, then maybe a
> headset with a USB microphone jack would solve the problem (as Damien
> suggested).  Does anyone have a suggestion for a good, but not too
> expensive, headset with USB microphone that will work well with Linux and
> GnomeMeeting?
> 
> -----Original Message-----
> From: Damien Sandras [mailto:dsandras seconix com]
> Sent: Tuesday, September 02, 2003 10:13 AM
> To: gnomemeeting-list gnome org
> Subject: Re: [GnomeMeeting-list] Bad echo
> 
> 
> > the bad echoing.  My question is: Is it normal to need to turn up the pcm
> > volume control?  Does everyone need to have mic and igain turned up on the
> 
> No (others here can confirm)
> > sender side and volume and pcm turned up on the receiver side?  Could this
> 
> No (others can confirm)
> 
> > be a clue to my problem?
> > 
> 
> I don't think so.
> 
> You really have to :
> - turn off the speakers
> - Make sure both sides are using a good quality headset (or you could
> get magnetic fields and echo)
> 
> I suggest you to go in the IRC channel and ask for a live test with
> someone there to help determining what is the cause of the echo. If you
> call that way a person who doesn't usually produce echoing (kilian for
> example), then it will be easy to see if he has echo with you or if you
> have echo. If you have echo from that person, then we are sure that the
> problem is with your headset or soundcard.
> 
> 
> > P.S. Some people responded that my sound card might be the cause of the
> > echo.  I am using the built-in Intel i810_audio card in my Dell Latitude
> > C610 laptop.  If my built-in audio card is the problem, does anyone have a
> > recommendation for a PCMCIA sound card that I can put in my laptop.
> 
> An USB headset is probably a better idea than a PCMCIA soundcard.

That means that the send and receive are too close still. What I believe
to be the problem is that your microphone is taking in the feedback.
When you talk, you shouldn't hear yourself.. You should only hear the
other party. If you can hear your voice then that is the problem.

-- 
Christopher Warner <zanee kernelcode com>
www.kernelcode.com
callto://ils.seconix.com/zanee kernelcode com

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