Linux-audio-user August 2004

linux-audio-user@lists.linuxaudio.org

148 participants
163 discussions

[linux-audio-user] Green's Functions Solutions for Audio

by davidrclark＠earthlink.net

Greetings all, This is probably more for developers, but I don't subscribe to that list and don't intend to, hence... I have published some notes on the use of Green's functions in audio. I have used the techniques described to create accurate 3-D stereo images as well as to produce instruments. I hope to release software some day. Meanwhile, for those with some knowledge of mathematical physics, these notes may prove to be helpful. These notes are rough drafts, so please do contact me regarding errors; my email address should be easily recontructable from the URL below. http://home.earthlink.net/~davidrclark/linux_audio_users/index.html File: greens.tgz Contains five notes: greens_3d.pdf (Green's Function Method for Creating Accurate Stereo Sound Images) greens_3d_vol.pdf (Ibid: Volumetric Sources) greens_cyl.pdf (Ibid: Cylindrical Volumes) greens_1d.pdf (Ibid: Simple One-Dimensional Example) greens_plucked.pdf (Ibid: Simple Plucked String) For those who have not yet heard the old demo (January 2004), it's at: http://home.earthlink.net/~davidrclark/latest.mp3 with description at: http://home.earthlink.net/~davidrclark/latest_mp3.html Some time ago, people have suggested a plug-in. I've given that some more thought, but I don't think it'll be easy to do. I wish it were. Also, I just don't have the time to work it all out in detail. My methods work fine for me at this time. Dave.

20 years, 1 month

[linux-audio-user] Re: Getting audio noise through midi cable

by Andrew Burgess

>I have my keyboard midi ports connected to my computer through the >game port on my motherboard sound card. It works fine, except I'm >hearing some noise through the audio output on my keyboard when the >midi cable is plugged into my computer. Whenever my computer is on >(whether or not the keyboard is), I hear a buzz, and it gets louder >whenever the hard disk is in use. Is there anything I can do to >correct this? I had some really strange pops and buzzes with a new soundcard yesterday, Turns out I'd forgotten to go in with alsamixer and mute/turn down all the inputs I wasn't using. The unmuted mic input was the problem even though nothing was plugged into it. Worth a try...

20 years, 1 month

[linux-audio-user] [ANN] PHAT version 0.1.0

by Pete Bessman

I'm pleased to annouce, after a solid month of heated debate with X11, the initial public release of PHAT, the PHat Audio Toolkit. From the website (www.gazuga.net/phat.php): "PHAT is a collection of GTK+ widgets geared toward pro-audio apps. The goal is to eliminate duplication of effort and provide some standardization (well, at least for GTK+ apps). It's open source software, licensed under the GNU GPL, version 2.0 or later." The debut and flagship widget is the fanslider, designed by Thorsten Wilm's. The LAU folks may not be too interested in the library as such, but might like to play around with this widget (hence the cross post). It comes with a demo program, "phatfantest," which displays the sliders in all their glory. Tarball: www.gazuga.net/phat-0.1.0.tar.gz Docs: www.gazuga.net/phat/index.html Let's actually go somewhere with all this debate about widgets and standards and such. Contributions are welcome (hint hint). I hope we can put an end to the Linux Usability Curse, at least in our own little neck of the woods. -- Pete www.gazuga.net ===================================================================== "I saw the movie 'I, Robot' recently, a film based loosely on a book written by science fiction author Isaac Asimov. In case you're not familiar with Asimov's writing, here's a list of things the movie had in common with the book: * The title." [maddox.xmission.com] =====================================================================

20 years, 1 month

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Linux-audio-user August 2004