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...d what the best practices are. > > > If you want to profile with symbols, you know you can compile a release > build with symbols, right? The CodeAnalyst documentation describes > how to do that with Visual Studio. (I've done it.) Ok. thx. > > > Tom > > Greger Burman <greger at mobile-robotics.com> wrote: > > > > I have a question about the overall performance of Speex and what I can > do > > to improve it. I'm running Speex Windows x86, Visual C++ EE compiler. I > will > > say right away that I've only compiled debug...

...AEC. > If you don't have restriction on using Vista's AEC DMO or XP"s DirectSound, > I would recommend using those. > > Tim > > ------------------------------ > *From:* speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] *On > Behalf Of *Greger Burman > *Sent:* Monday, August 10, 2009 5:40 AM > *To:* speex-dev at xiph.org > *Subject:* [Speex-dev] AEC troubleshooting > > I'm experiencing little to no damping of acoustic echo from the echo > cancellor and I can't figure out why so far. I thought I should try the > echo...

If more than one speaker receives the *same* signal, it doesn't matter the number of speakers. It only gets tricky when the speakers are playing slightly different signals (e.g. from a stereo song). Jean-Marc Quoting Greger Burman <greger at mobile-robotics.com>: > One thing I can think of is if you are using two or more speakers. If the > speakers are not at the exact same distance from the mic, you will get more > than one echo. AEC can not handle that. Try disconnecting all but one > speaker and see if...

...SIO Soundcard provides interface for that) So if I am remebering correctly, with data from Mic and Speaker in sync, speex AEC should do the job. Tim _____ From: Guilherme Balena Versiani [mailto:guibv at comunip.com.br] Sent: Tuesday, August 11, 2009 1:33 PM To: Tim Na Cc: 'Greger Burman'; speex-dev at xiph.org Subject: Re: [Speex-dev] AEC troubleshooting Hello Tim, Please explain exactly what you are meaning by "expose speaker input as other OS". Did you reference system latency? If you do so, I would like to understand better how the acoustic echo cancellation wo...

Hello again, At this school I am working we are setting up a wireless network. What would be the best way to set up the system to this network? How should we log in to Samba? What should I consider. The wireless system has already been purchased by people who have left. Kind regards Anna-Karin

...how to boost the performance with as little code rewrite as possible. The architecture for release build will be SSE/SSE2 capable. 1) Compiler optimizations: Recommended options? 2) SIMD. Is Speex written to take advantage of SIMD architectures? What must I do to take advantage of this? -- Greger Burman -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20090615/b0fbc690/attachment.htm

...d Speex AEC works great from developer who used windows with ASIO Soundcard. Vista AEC DMO or XP DirectSound AEC function does reasonable job and that's what I am currently using. Tim _____ From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On Behalf Of Greger Burman Sent: Tuesday, August 11, 2009 1:15 AM To: speex-dev at xiph.org Subject: Re: [Speex-dev] AEC troubleshooting I actually forgot to mention that I'm using ultra-wideband mode, but seems like you understood that anyway. Is this true that Speex echo cancellation only performs well in narrowband...

Quoting Greger Burman <greger at mobile-robotics.com>: > The reasons I have posted these questions are: 1) To find out if Speex can > take advantage of SIMD extensions. If you define _USE_SSE, CELT is already able to use SSE instructions. You must be careful on Windows though because it doesn't support...

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...rns denoising on(1) or off(2) SPEEX_PREPROCESS_SET_AGC Turns automatic gain control (AGC) on(1) or off(2) I noticed that setting a value of 0 turns the setting off. Setting a value of 1 or 2 turns the setting on. While I do think 1 and 0 is more logical, it contradicts the documentation. -- Greger Burman -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/speex-dev/attachments/20090529/bfd3545a/attachment.htm

...has extra checks that may have a significant performance impact depending on the code. If you want to profile with symbols, you know you can compile a release build with symbols, right? The CodeAnalyst documentation describes how to do that with Visual Studio. (I've done it.) Tom Greger Burman <greger at mobile-robotics.com> wrote: > > I have a question about the overall performance of Speex and what I can do > to improve it. I'm running Speex Windows x86, Visual C++ EE compiler. I will > say right away that I've only compiled debug so far and used no compiler...

On 2010-03-16 06:35, Greger Burman wrote: > Ok. Thanks J-M for clearing that up. > What if you mix up the polarity on one speaker (180 degree phase > change), would that matter? Not at all. It's still all linear. You can even apply a different equalizer to each speaker and it'll still be linear. Jean-Marc >...

Hi, I am new with SAMBA so please be patient if the questions are silly.? I have a network with some 100 computers and 150 users. How can I add new users to the system? I know I have to add them both to Samba and Linux. The YAST GUI is no problem, it's more when I come to Samba. I think I am logged in as root in the Linux prompt and try to add users, but am not successful.? Is there

Hi, I'm planning to apply for SoC and I would like some hints on which projects the community are most interested in. The two projects that I right now think looks most interesting is: * Writing an backend for MIPS and * New Transformations and Analyses - Implement GVN-PRE - Value range propagation pass What do you think, would any of these two make a good SoC project?

First of all, thank you for your input Tim. That is very helpful. I would love to hear from other people with experience of AEC and Speex. I guess I have to split my question into to parts now. 1. Is it a fact that using the windows multimedia API (wave audio) for audio capture and playback makes it impossible to do echo cancellation with Speex AEC or other EC method due to inprecise timing? I

Hello. I have the following situation. AEC is used in network chat software over DirectSound API. Echo and reference signals are almost aligned (delay is no more than 30ms). When echo is emulated in notebook (built-in speakers + mic) everything goes fine and echo is cancelled. But when configuration includes stand-alone speakers and mic no echo is removed. Audio is in 22050 hz at 16 bit

...ve a few different transfer functions, that may be an option. For time-varying spatialization with many (>2) channels, forget about AEC unless you're willing to spend a *lot* of time on that. Jean-Marc > Thanks, Josh > > > >> Jean-Marc >> >> Quoting Greger Burman<greger at mobile-robotics.com>: >> >>> One thing I can think of is if you are using two or more >>> speakers. If the speakers are not at the exact same distance from >>> the mic, you will get more than one echo. AEC can not handle >>> that. Try discon...

...e person managing the list at > speex-dev-owner at xiph.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Speex-dev digest..." > > > Today's Topics: > > 1. Re: voice sound like robot voice :) (Greger Burman) > 2. Re: voice sound like robot voice :) (Tim Rijavec) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 3 Sep 2009 10:21:49 +0200 > From: Greger Burman <greger at mobile-robotics.com> > Subject: Re: [Speex-d...

I'm trying to understand a bit more about the inner workings of the speex resampler. I want to do resampling on a voip stream. High quality and low latency is important. 1) What does speex_resampler_magic() do? 2) I find that resampling has quite an impact on performance and I'm trying to figure out where the cpu cycles are going and see what can be done to reduce the cost. I ran a profile

....Valin at usherbrooke.ca> > If more than one speaker receives the *same* signal, it doesn't matter the > number of speakers. It only gets tricky when the speakers are playing > slightly > different signals (e.g. from a stereo song). > > Jean-Marc > > Quoting Greger Burman <greger at mobile-robotics.com>: > > > One thing I can think of is if you are using two or more speakers. If the > > speakers are not at the exact same distance from the mic, you will get > more > > than one echo. AEC can not handle that. Try disconnecting all but one...