RE: [GnomeMeeting-list] Bad echo

[Damien Sandras <dsandras seconix com>]

Something I thought about :
Do you hear echo when you are using the Druid Audio tester?


Le mar 02/09/2003 à 19:38, mark h aldous L-3com com a écrit :
> 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.
-- 
 _	Damien Sandras
(o-	GnomeMeeting: http://www.gnomemeeting.org/
//\	FOSDEM 2003:  http://www.fosdem.org
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