Hi Chris! Christoph Willing schrieb: > > On 21/06/2007, at 7:03 AM, Ed Brannin wrote: > >> On 6/20/07, Michael Braitmaier <[email protected] > wrote: >> Hi everyone! >> >> [snip] >> I decided for a solution which is in the beginning a bit more work. I >> ended up buying the following DSP-EchoCanceler-Board >> >> http://www.phnxaudio.com/Default.aspx?tabid=75 >> >> Basically it does the same as their PCI-Card which however only fits in >> Desktop-PCs. (see link for information: >> http://www.accessgrid.org/node/116) >> >> We've had a SOHO card for a while, but never installed it until >> today. Sadly, it performed just like the hardware listing said: >> > > > The performance description in that particular hardware listing is > open to wide interpretation - > "neither local nor remote sites noticed any audible difference > from that produced by our standard setup" > since it depends the status of the "standard setup". > > Perhaps the author could elaborate on whether the standard setup > includes working echo cancellation, or has none. > > > chris
My experience with the DSP version was good so far, however it needed 1 upto 2 seconds to adapt to new speaker levels, or changed distances between mic and speaker. Unfortuanetly the production environment I used it recently, consisted of an old palazzo in Bologna/Italy which didn't provide the best accoustic environment due to high rooms with half-sphere roof charactersistic, which itself already caused a certain echo or hall effect. So this was not the best opportunity to completely test echo cancelation. However we plan to continue the use of the device and I hopefully can give an update on its echo canceling capability in the future, when we have more results. Our intial tests in the office over AG with a room based node however were fine. Michael > > > >> It doesn't work. At least, not in a small, square room with >> wall-mounted speakers. We played a video on the computer, then >> watched Rat's talk levels match William Shatner's voice. >> >> From your email, it's hard to tell if you're using their DSP board, >> or if you've just bought one and still need to put it together. >> Either way, I'd like to know: does your way of doing it actually >> cancel any echo? >> >> Thanks, >> -Ed Brannin @ RIT >> [email protected] >> >> PS: So far, we've been most pleased with an Accumic PC. We've also >> had mixed results from chaining together several of Phoenix Audio's >> Duet Executive microphones, but the seem to work in our current >> arrangement. > > > Christoph Willing +61 7 3365 8350 > QCIF Access Grid Manager > University of Queensland > > > > -- ------------------ Dipl.-Inf. Michael Braitmaier HLRS - Visualization / Video Conferencing University of Stuttgart Germany Phone: ++49 711 685 65996 Fax : ++49 711 682 357 Website: http://www.hlrs.de/people/braitmaier/
