Fw: [AG-TECH] XAP setup

[Natalia Costas Lago]

- 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" <natalia at cesga.es>
To: <peirce at maine.edu>
Cc: "ag-tech" <ag-tech at 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: <peirce at maine.edu>
> To: "Natalia Costas Lago" <natalia at 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" <natalia at cesga.es>
>>> To: <ag-tech at 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: natalia at 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   peirce at maine.edu   1-207-581-3539
>> ============================================
>> ==                   Network Analyst
>> ==     UNET Technology Services, Network Operations
>> ==              University of Maine System
>> ============================================
>>
>>
>>
>>
>
>