[AG-TECH] XAP setup - urgent
Tom Coffin
tcoffin at ncsa.uiuc.edu
Thu Feb 17 17:12:44 CST 2005
You may need to increase the number of microphones
in your setup. For 6-8 people we use a minimum of 4 (crown)
table top mics.
________________________________________________
At 04:39 PM 2/17/2005, Natalia Costas Lago wrote:
>mmm.... that doesnt seem to be an acceptable solution for us.
>
>What I have experienced in our meetings is that we can have up to 6-8
>people talking to 2 supercardioid microphones and each of them speak at a
>different level. It is too hard (impossible) for a tech to try to adjust
>the level each time any of them speak (sometimes some of them at the same
>time :)))).
>
>I recall a sentence I read in one of those accessgrid papers... "for the
>tech to vanish...". That's what we want, the less a tech has to care about
>the better. I think the XAP should be able to do AGC (automatic gain
>control) if it is set properly. We do not have problems with noise level
>increase if there is a proper threshold set, maybe.. do some other
>problems appear?.
>
>Personally, what I get out of my experience is that I rather prefer our
>system after enabling the AGC than before. But I think our settings can be
>improved, that's why I am cc'ing clearone tech staff, they are the ones
>who can tell us what we can get out of the XAP.
>
>
>
> >
> > We run into people with different speaking levels
> > a lot during meetings here at ACCESS. The way we handle it
> > is to try and identify a microphone for the soft spoken speaker
> > and boost the fine gain control for it using gware.
> >
> >
> > _______________________________________________
> > At 12:16 PM 2/17/2005, Natalia Costas Lago wrote:
> >>"urn:schemas-microsoft-com:vml" xmlns:o =
> >>"urn:schemas-microsoft-com:office:office" xmlns:w =
> >>"urn:schemas-microsoft-com:office:word" xmlns:st1 =
> >>"urn:schemas-microsoft-com:office:smarttags">
> >>
> >>Hi Paul,
> >>
> >>I think we do really need the AGC settings, the audio levels are
> >>uncontrolled without it. We avoid echo issues with them, maybe do you
> >>use the Compressor feature?.
> >>
> >>There is some trouble with people that speak louder or lower. I think
> >>there has to be a right way to set it...
> >>I am CC'ing clearone tech guys, maybe they have some advice?
> >>
> >>Kind regards,
> >>Natalia.
> >>
> >>----- Original Message -----
> >>From: <mailto:Paul.Kuchar at manchester.ac.uk>Paul Kuchar
> >>To: <mailto:natalia at cesga.es>'Natalia Costas Lago'
> >>Sent: Thursday, February 17, 2005 5:54 PM
> >>Subject: RE: [AG-TECH] XAP setup - urgent
> >>
> >>Dear Natalia,
> >>We advise AG nodes to use the default value of OFF for AGC/SL as trying
> >>to configure it causes all kinds of strange audio noises.
> >>
> >>This is also the advice from inSORS.
> >>
> >>AGC tries to control the gain and SL expands the sound of anything
> >>quiet. Unless you make any progress with the parameters, try switching
> >>AGC/SL off.
> >>
> >>Regards,
> >>Paul Kuchar, AGSC
> >>Collaborative Working Developments
> >>===============================
> >>Manchester Computing, Kilburn Building
> >>University of Manchester, M13 9PL,
> >>United Kingdom
> >>===============================
> >>Tel: +44(0)161-275 0668
> >>Fax: +44(0)161-275 6800 / 6040
> >>Email:
> >><mailto:Paul.Kuchar at manchester.ac.uk>Paul.Kuchar at manchester.ac.uk
> >>
> >>
> >>----------
> >>From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov] On
> >>Behalf Of Natalia Costas Lago
> >>Sent: 17 February 2005 16:25
> >>To: ag-tech
> >>Subject: [AG-TECH] XAP setup - urgent
> >>
> >>
> >>
> >>Dear all,
> >>
> >>
> >>We are quite in an emergency: our inauguration is about to happen (25th
> >> february). And we still have too many audio problems. I've followed
> >>some advices given here and given by te people from clearone and they
> >>helped us to understand the proceedings to configure the XAP settings.
> >>However there are some issues still. I hope someone out there with
> >>much experience in this equipment (and in audio systems) could help
> >>us:
> >>
> >>- We would like to know how to set the best AGC parameters (most
> >>importance) and Gating parameters. I think proper AGC settings would
> >>solve a big part of our problems.
> >>- The group the mics belong is set to none, I hope this involves only
> >>gating issues (we want to hear whatever speaker wanna say, so we are
> >>not interested in priority of one mic over another mic). May we have
> >>any problems derived from this point?
> >>
> >>
> >>Any help is greatly appreciated.
> >>
> >>Thanx a lot.
> >>Kind regards.
> >>
> >>Natalia.
> >>
> >>-----------------------------------
> >>Natalia Costas Lago
> >>email: <mailto:natalia at cesga.es>natalia at 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/>http://www.cesga.es/
> >
> >
> > ___________________________________________________________
> > Tom Coffin .......................... tcoffin at ncsa.uiuc.edu
> >
> > NCSA-ACCESS cel: 703-477-5948
> > 901 North Stuart Street, #800 tel: 703-248-0105
> > Arlington, Virginia 22203 fax: 703-248-0100
> >
> > _________________________ http://www.ncsa.uiuc.edu/~tcoffin
>
>
>
>-----------------------------------
>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/
___________________________________________________________
Tom Coffin .......................... tcoffin at ncsa.uiuc.edu
NCSA-ACCESS cel: 703-477-5948
901 North Stuart Street, #800 tel: 703-248-0105
Arlington, Virginia 22203 fax: 703-248-0100
_________________________ http://www.ncsa.uiuc.edu/~tcoffin
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