Hi Leslie,
How do u manage to compensate quiet and loud talkers in a room?. Maybe with the compressor feature?. I send u a copy of our XAP settings (the report). It seems that sound in our rooms is more stable with AGC enabled, some of our rooms are very noisy, we need about 10 dB of noise cancelation in order to get a clean audio signal. There probably is a problem when AGC works with a signal that suffered an big noise cancellation and echo cancellation process (noise cancellation is performed before automatic gain control... there might be a problem with this?). ----- Original Message ----- From: Leslie Grant To: Natalia Costas Lago ; Paul Kuchar Cc: ag-tech ; Vicente Goyanes - UVIGO ; Raul Ferreira ; Amândio Antunes ; JM Rodriguez Quintas - UVIGO ; Celso Caride - UVIGO ; [email protected] ; Ignacio Lopez Sent: Thursday, February 17, 2005 6:34 PM Subject: RE: [AG-TECH] XAP setup - urgent I never use AGC as a way to compensate for loud and quiet talkers in a room. Keep in mind that if you are trying to pick up the quiet talked in the room from 20 feet away by using AGC you are going to also boost all the noise that accompanied that signal. The nose is a constant level while the talker audio will attenuate as it travels. What type of microphones are you using, where are they placed and how many do you have? ------------------------------------------------------------------------------ From: Natalia Costas Lago [mailto:[email protected]] Sent: Thursday, February 17, 2005 10:16 AM To: Paul Kuchar Cc: ag-tech; Vicente Goyanes - UVIGO; Raul Ferreira; Amândio Antunes; JM Rodriguez Quintas - UVIGO; Celso Caride - UVIGO; [email protected]; Ignacio Lopez; Tech Mailbox Subject: Re: [AG-TECH] XAP setup - urgent 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: Paul Kuchar To: '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: [email protected] ---------------------------------------------------------------------------- From: [email protected] [mailto:[email protected]] 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: [email protected] 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/
clearone-170205.PDF
Description: clearone-170205.PDF
