Hello Andrew, We've run several BiAmp Nexia VC's around our campus and found that they do an excellent job on the echo cancellation front. Very flexible in configuration and easy to adjust using a web interface. We also have the RS.232 port in use for remote mic on/off.
Clearone are not my favourites: We have Converge 560's and a 590 in use but they are almost impossible to get operating well for echo cancellation. They will reduce the volume and cut the bass from a local talker when audio arrives from an external venue. They work fine when only one venue is speaking at a time, but paper noises, coughs or laughter etc cause this effect. All Clearone could suggest was to ensure the in/out levels were well matched. Despite careful adjustment, (which did give an improvement) I've not been able to get the quality of the Nexias. I've tested our Nexias with other Nexias and also with Clearone Interact units at other uni's and found the same fault on the Interact units. I've also found the fault on a couple of Clearone RAV900's but they at least could be adjusted to be acceptable. Others may have had different experiences, and I'm hopeful that a reliable method for calibration will appear for the Clearone equipment. (I've tried using tone and pink noise for setting levels at both local and remote venues, and tested with a pre-recorded repeating voice test in both venues but couldn't fully eliminate the strangling effect.) Of course, Clearone's other units may perform well but I've had no experience of those. Regards, Lloyd Pearson eConferencing Specialist Teaching & Learning Facilities, ITS University of Otago Dunedin New Zealand Ph +64 3 479 8997 lloyd.pear...@otago.ac.nz -----Original Message----- From: Andrew Daviel [mailto:ad...@triumf.ca] Sent: Saturday, 4 May 2013 10:58 a.m. To: accessgrid-tech@lists.sourceforge.net Subject: [AG-TECH] Biamp as echo canceller ? I did an AG install some years ago, when the recommended echo canceller hardware was the Gentner XAP. For some reason I forget now, I chose the Vortex EF series instead which seemed very similar in concept and capabilities. So I'm familiar with both those product lines. We have had a proposal from a consultant to upgrade our auditorium systems, which is a multi-purpose venue - some local audio reinforcement for local meetings, some Evogh video, some H323, speakerphone, playing movies etc. We currently have an EF2241 with no spare channels. The consultant wants to use a Biamp AudiaFlex system, which I've never heard of. Is that a step up/down/sideways or just different ? One thing we want to do is have some control from a Crestron system. I'm not sure exactly what, but switching video sources is one, and being able to set the audio reinforcement gain from the podium is another. For our AG install, Crestron seemed like overkill and expensive so I didn't go there. Vortex runs standalone with programming/monitoring over RS232 from a Windows application, and boasts some kind of optional passthru module that's supposed to work with Crestron. -- Andrew Daviel, TRIUMF, Canada Tel. +1 (604) 222-7376 (Pacific Time) ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ accessgrid-tech mailing list accessgrid-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/accessgrid-tech ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ accessgrid-tech mailing list accessgrid-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/accessgrid-tech
