The problem is solved setting the Non Linear Processing parameter to "Aggresive" in the AEC menu. I noticed the following effects:
- There is more echo than ever (it seemed like "Aggressive" was "Off" and viceverse). I can hardly appreciate any difference between "Soft" and "Medium" (there is still the full-duplex issue with those settings). - There is complete full duplex. I tested it and can repeat the procedure getting the same effect. So, the question is: - Are the levels for NLP: "Off", "Soft", "Medium" and "Aggresive" inverted? Any suggestions about how to ease the AEC process.. so i dont loose so much full duplex capabilities with soft or medium NLP level? This is weird!! Ah... I upgraded to 2.0.1 firmware lately, and I am using 5.0.2 version of Gware... The problem started prior to the upgrade. Any help or new ideas are greatly appreciated. Kind regards, Natalia. PS: I'll try to contact Clearone and keep you up to date with this funny thing. ----------------------------------- Natalia Costas Lago email: nata...@cesga.es Centro de Supercomputacion de Galicia (CESGA) Avenida de Vigo, s/n Campus Sur 15706 Santiago de Compostela - SPAIN Tel: +34 981 56 98 10 Fax: +34 981 59 46 16 http://www.cesga.es/ ----- Original Message ----- From: "Natalia Costas Lago" <nata...@cesga.es> To: "Natalia Costas Lago" <nata...@cesga.es>; <pei...@maine.edu>; "Robert Olson" <ol...@mcs.anl.gov> Cc: "ag-tech" <ag-t...@mcs.anl.gov> Sent: Tuesday, December 28, 2004 11:16 AM Subject: Re: Fw: [AG-TECH] XAP setup > > - NOM is deactivated. > - Only one microphone unmuted. > > Each time I check "Enable Acoustic Echo Canceller (AEC)" or set Non Linear > Processing (NLP) to "Soft" (instead of "Off") I get this effect. Cant > speak on my node at the same time a PIG is playing an audio file. > > Mi question is, has someone done the same test? I cant really appreciate > the problem that much just with normal speech. It must be a continuous > sound (playing music por example). Maybe this is normal? > > ----- Original Message ----- > From: "Natalia Costas Lago" <nata...@cesga.es> > To: <pei...@maine.edu> > Cc: "ag-tech" <ag-t...@mcs.anl.gov> > Sent: Tuesday, December 28, 2004 9:34 AM > Subject: Re: Fw: [AG-TECH] XAP setup > > >> >> I've read about mics gain adjustment, but i am unsure about what is best >> about gain from "Rx from Codec" input (it is better to send the loudest >> level from PC audio, so I will have a strong signal on the XAP input? or >> that doesnt matter?) >> >> I'll think about NOM parameter, that is something i missed to think >> about. >> >> ----- Original Message ----- >> From: <pei...@maine.edu> >> To: "Natalia Costas Lago" <nata...@cesga.es> >> Sent: Monday, December 27, 2004 9:47 PM >> Subject: Re: Fw: [AG-TECH] XAP setup >> >> >>> Natalia, >>> The XAPs (I use XAP800's in other projects) are capable of full >>> duplex with AEC. >>> You might start by checking what your AEC reference for the >>> microphones is comprised of. It should be made up of the lines >>> sources coming into the room (remote sites, locally reinforced line >>> inputs like VCRs). I'm wondering if you may have the microphones >>> themselves included. >>> >>> You should also check your gain staging (using the meters) so that >>> the levels are appropriate at every input and output stage. >>> >>> Might you have NOM enabled on the outputs to remote sites? >>> This might be altering output levels as the number of mics changes. >>> >>> Have you tried contacting ClearOne support? >>> >>> >>> On 27 Dec 2004 at 20:29, Natalia Costas Lago wrote: >>> >>>> >>>> I think we have identified when the problem occurs,... when setting >>>> the AEC or NLP (not neccesarily AEC selected) the full duplex >>>> capabilities are lost (i play a sound with a PIG and talk at the same >>>> time... my voice is completely atenuated!). >>>> >>>> Is this all I can get from the XAP?. There's no way to get _complete_ >>>> full duplex and AEC free?. Our users have noticed the effect (when >>>> people talk at the same time one is atenuated). >>>> >>>> Any hint about this? Can any site have a test with us? >>>> >>>> ----- Original Message ----- >>>> From: "Natalia Costas Lago" <nata...@cesga.es> >>>> To: <ag-t...@mcs.anl.gov> >>>> Sent: Monday, December 27, 2004 7:32 PM >>>> Subject: [AG-TECH] XAP setup >>>> >>>> >>>> > >>>> > >>>> > >>>> > Hi, >>>> > >>>> > I was wondering wether someone out there could help me to solve some >>>> > issues regarding the XAP. It would be good if he/she had the VNC on >>>> > the control PC, so i can have a look at the audio levels on the >>>> > different stages. I think part of the current problem might be >>>> > missconfigured audio levels (i know about theory in mics level.. but >>>> > i am unsure about the input audio theory). >>>> > >>>> > We've been working hard on these issues and we are still having >>>> > trouble. I would greatly appreciate some more help and patience from >>>> > AG community... >>>> > >>>> > Kind regards and thanx in advance, >>>> > Natalia. >>>> > >>>> > >>>> > ----------------------------------- >>>> > Natalia Costas Lago >>>> > mailto: nata...@cesga.es >>>> > >>>> > Centro de Supercomputacion de Galicia (CESGA) >>>> > Avenida de Vigo, s/n Campus Sur >>>> > 15705 Santiago de Compostela - SPAIN >>>> > Tel: +34 981 56 98 10 >>>> > Fax: +34 981 59 46 16 >>>> > http://www.cesga.es/ >>>> > >>>> > >>>> > >>>> > >>>> >>> >>> >>> Garry Peirce pei...@maine.edu 1-207-581-3539 >>> ============================================ >>> == Network Analyst >>> == UNET Technology Services, Network Operations >>> == University of Maine System >>> ============================================ >>> >>> >>> >>> >> >> > >
