Hi again,
The main problem we have is that we arent able to get complete full duplex, that means.. that from time to time the sound seems to vanish, we have an even worse effect when two people (each one from each site) try to speak at the same time.. when this occurs the sound of one of the nodes starts to decrease and being distorted. When the mics of one of the sites are muted, there's no problem with the sound coming from the other. It is quite an annoying problem so we are not happy with the current configuration. I'll go through all ur advices in order to get a good audio levels, maybe that's the origin of the problem. ----- Original Message ----- From: Osland, CD (Chris)<mailto:c.d.osl...@rl.ac.uk> To: 'Natalia Costas Lago'<mailto:nata...@cesga.es> ; ag-tech<mailto:ag-t...@mcs.anl.gov> Sent: Monday, December 20, 2004 1:15 PM Subject: RE: [AG-TECH] Fw: Test to get better XAP settings This is written in a bit of a hurry and without the software in front of me but basically ... Mute the feed to your speakers. For each mic { set the coarse gain as necessary (usually the -50 or is it -55 dB) turn its meter on and adjust fine gain on the mic until loudish speaking gets it above the halfway (0 dB) mark while normal speaking has it just below turn off AGC (in my opinion) turn off gating if you're going to be in a small or medium meeting but arguably leave it on if you're in a monster meeting make sure echo cancellation is on and the reference is to the feed to your speakers } Now go to the Outputs frame and turn on the meter of the feed to the audio computer. Adjust its gain until it is like the mics' (just below 0 dB for normal speech, just above for loud speaking). Now go to RAT and get it so that normal speaking is usually green with a few yellows, and loud speaking just occasionally hits a red. Make sure RAT silence suppression is OFF - let the Gentner do everything or it will get confused and sulk. Now turn your speakers back on and, in RAT, get the incoming level from a trusted source into the same region (green/yellow normal, yellow/red occasionally). Now back to the Gentner and look at the Line input from the computer - get that straddling 0 dB as above. Now go to the Outputs frame and get the same result on the output(s) feeding the speakers. Finally go the the speakers (if active) or amps (if passive) and set the sound level to a comfortable level; if you have a sound level meter 70 dBA on A-weighting is conventional. Never be in a hurry to adjust audio when you first get into a venue; the echo canceller takes time to settle (say 2 mins) so let things ride for that amount of time while you get seating, lighting and camera angles sorted out, THEN fix the audio if there's still a problem. Cheers Chris ____________________________________________________________________ Chris Osland Office tel: +44 (0) 1235 446565 Digital Media and Access Grid Medialab tel: +44 (0) 1235 446459 BIT Department Access Grid room tel: +44 (0) 1235 445666 e-mail: c.d.osl...@rl.ac.uk Fax: +44 (0) 1235 445597 CCLRC Rutherford Appleton Laboratory (Bldg. R18) Chilton, DIDCOT, Oxon OX11 0QX, UK [The contents of this email are confidential and are for the use of the intended recipient only. If you are not the intended recipient do not take any action on it or show it to anyone else, but return this email to the sender and delete your copy of it.] -----Original Message----- From: owner-ag-t...@mcs.anl.gov [mailto:owner-ag-t...@mcs.anl.gov]On Behalf Of Natalia Costas Lago Sent: 20 December 2004 10:25 To: ag-tech Subject: [AG-TECH] Fw: Test to get better XAP settings I had to resend this email.. it doesnt reach the list!! Maybe with this second try? ----- Original Message ----- From: Natalia Costas Lago<mailto:nata...@cesga.es> To: ag-tech<mailto:ag-t...@mcs.anl.gov> Sent: Monday, December 20, 2004 11:04 AM Subject: Test to get better XAP settings Hii.. I need someone to help me to improve my XAP settings for a better audio quality.. anyone out there? Or just to help me.. I can try to guess the better ones... Thanx in advance, Kind regards, Natalia. ----------------------------------- Natalia Costas Lago email: nata...@cesga.es<mailto: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/
