Linux-audio-dev

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7513 discussions

Re: [linux-audio-dev] 3D fft analysis program

by michael tewner

I'm currently doing this in TCL/TK. I started using the snack audio library which (anong other things) makes spectrograms. I give it consecutive chunks of audio and have it redraw to the canvas every n milliseconds. I think it's having trouble keepingup, and it only knows how to do 2d plots. I'm considering doing the processing beforehand (ie, on load) and storing the entire time-domain fft into a matrix, then using a graphics library (plot3d) to graph it in real time... unless I can figure outhow to multithread the program to allow one function to read ahead while the other graphs it. Anyway, I've never programed tcl/tk before, but I'm trying to get this done before january. -tewner > On Sun, 3 Oct 2004, Dave Phillips wrote: > > > HiAndres: > > > > At last, someone's going to try it ! :) > > > > I'm hoping that you're thinking of a realtime display, in which the > > peaks roll off to create a true waterfall effect. > > > > Stanko Juzbasic has tried to port Alan Peever's Spectrogram from SGI > > machines to Linux, but I've not been able to get his sources built on my > > systems. > > > > Please keep me informed about your progress, I've wanted such a > > program for many years. > > > > Best regards, > > > > dp > > > > > > > > Andres Cabrera wrote: > > > >> Hi all, > > > I am planning to develop a 3d fft display (sometimes called cascade > > > display), since I haven't found an application that does that in linux. > > > Does anyone know if such an application exists or is in the works? > > > > > > Cheers, > > >Andr?s > > > > > > > > > > > > >

20 years, 11 months

[linux-audio-dev] Looking for a home for a small jack utility....

by Dan Mills

Hi All, I have a small utility (jackswitch - a clickless <hopefully> audio switch for the jack enviroment) and was wondering if there is a site for hosting this kind of small simple utility program. Sure I could create a web site for it but it seems rather silly to write a website that is probably going to be larger then the tarball it is created to host! Steve, would plugin.org.uk take it?

20 years, 11 months

[linux-audio-dev] noatime?

by Juhana Sadeharju

Hello. After all the other disk tunings, does noatime in the mount options help? When the atime is changed? At each read()? Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

20 years, 11 months

[linux-audio-dev] Re: LAC 2004 recordings now online

by Juhana Sadeharju

>From: Joern Nettingsmeier <nettings(a)folkwang-hochschule.de> > >http://linuxaudiodev.org/contrib/zkm_meeting_2004/ Where one could get the furry penguin like in this photo: http://www.linuxdj.com/audio/lad/contrib/zkm_meeting_2004/photos/frank_neum… Who are the people in this photo? http://www.linuxdj.com/audio/lad/contrib/zkm_meeting_2004/photos/frank_neum… Please send me names privately. I will make a new image with names attached to it. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

20 years, 11 months

Re: [linux-audio-dev] 3D fft analysis program

by Andres Cabrera

Hi all, I'm wondering if there would be a benefit implementing the Loris analysis library (http://www.cerlsoundgroup.org/Loris/) additionally to the usual fft techniques for a visual spectrum analyzer. Would there be visual differences in both analysis that would be worth while? Cheers, Andrés Andres Cabrera wrote: > Dave, > Thanks, I hadn't seen the 3d spectrogram in snd. It does pretty much what I wanted to do. So I'll refocus and try to get it working in realtime first. It will probably take longer (because I have no idea about jack and the like), but I'll get it started. > Thanks for all the suggestions and the pointers from everyone, when I've made some progress I'll post. > Cheers, > Andrés > > Dave Phillips wrote: > >> Downer wrote: >> >>>> I'm hoping that you're thinking of a realtime display, in which the >>>> peaks roll off to create a true waterfall effect. >>>> >>> >>> >>> >>> >>> Baudline (http://www.baudline.com) is a fantastic viewer that does fft cascade. I've used it for a couple of years, and it is great for figuring out how different sounds "work", and it has an oscilloscope-type display as well. >>> >>> >> Alas, whle baudline is indeed a wonderful application it doesn't do a true waterfall display. Please see the results on Google for 'alan peevers spectrogram' for more info regarding what I'm looking for. >> >> Btw, there's a way to set Cthugha to do this, and I believe it might be possible with Pd. Snd creates a nice OpenGL FFT display but it's not realtime. >> >> Best, >> >> dp >> >> >> > > >

20 years, 11 months

[linux-audio-dev] MP3 timestretch in real time

by Suzana Mesquita de Borba Maranhao

Hi Anybody knows any software that enable MP3 timestretch in real time? I want no file conversions. In addition, I prefer a software that process the MP3 stream and not the stream MP3 after decoding process. Anybody knows any algorithm for this? Sorry by my english faults. Regards, Suzana

20 years, 11 months

[linux-audio-dev] qjackctl port list

by Fons Adriaensen

Hello, Is there any way to stop qjackctl from re-ordering a client's ports in its connection dialog ? IMHO the author of a client probably had her/his good reasons for the order chosen, and qjackctl should leave this alone. -- FA

20 years, 11 months

[linux-audio-dev] [ANN] QjackCtl 0.2.12a released!

by Rui Nuno Capela

Hi, QjackCtl 0.2.12a has been released. Some fix on the audio connections client port sorting is about to justify this immediate release. Thanks goes this time to Fons Adriaensen, for pointing this out. Enjoy! -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

20 years, 11 months

Re: [linux-audio-dev] killer app idea

by mailbox1

Hi Aaron, I fully understand what you are trying to say. They are 2 excellent ideas and really moving thought into an area of futuristic methods. It must be quite incredible to see the hebrew words (which I understand) being displayed visually. I suppose the ultimate test for your idea would be to draw the hebrew letters and hear them being reproduced aurally (WOW). I can envisage an inordinately massive amount of coding :) Jennifer Dillon M.I.S.T.C. member of the p1639 working group ----- Original Message ----- From: "Aaron" <aamehl(a)actcom.net.il> To: "The Linux Audio Developers' Mailing List" <linux-audio-dev(a)music.columbia.edu> Sent: Monday, October 11, 2004 8:52 PM Subject: [linux-audio-dev] killer app idea > Hi all, > > I have been mostly lurking so far but I thought I might send out two > ideas for killer apps I had. > > 1. Basically a front end to lilypond which will work > more like a audio program. > > In many audio editors you can see the wav or a square block on a track. > > I had this idea of a notation editor that has tracks you can create your > form ABA, lets say, and add markers for them. Then create motives which > via midi or notation will become lilypond notation in the end. This > chunk can then be put on a track. > >The chunk can be displayed as a staff with the notes(graphic), as the > lilypond, or just a blank track. In the same way a daw may display a > chunk of audio a a rectangle or a wave. > > These Chunk can be copied, pasted transposed retrograded etc, new chunks > could be added and manipulated. > > My reasoning is as follows, when will Linux shine? when it does > something unique not done by others. Thats what makes jack/ardour etc so > appealing. > > Fo notation midi input exists with rumor or a number or existing libs, > creating an on the fly lilypond file is very possible, infact if the > graphic (staff) representation was left off all the parts already exist. > > > 2. This I call V.A.W it has a drawback in that the base technology is > currently closed source, but this might be subject to change.. > > here goes a inventer I know wanted to see if it was possible to recreate > what it says in the Hebrew Torah (Bible) the the Jews on Mount Sinai > Roim et Ha Kolot. (they say the sounds) He created a way to translate > sound waves into light waves and display them. He found some very > interesting things. (Hebrew letters spoken display as the shape of the > letter). I sang into his device and saw Bach and other music display via > his device. All overtones are displayed and visible as different colors. > The sound of a audio mix is visually open for all to see. > > This is very hard to grasp without seeing..... > > My idea is to take his algorism/app and reverse the process and have the > ability to take the visual and turn it back to audio. This would be like > view on midi editors with the squares you can change to effect the > sound, only not midi but audio! > > I wrote out very detailed plans for this app, again this is something > that just doesn't exist, image not having to rely soley on your ears > when adding effects to a mix but being able to see how the changes you > make actually effect the way it looks/sounds and I mean in detail. There > are so many possibilities for this. > In a regular daw your see I think only amplitude and something else (the > wav display) > > If this one isn't clearly described I will try again. > > Aaron > >

20 years, 11 months

[linux-audio-dev] killer app idea

by Aaron

Hi all, I have been mostly lurking so far but I thought I might send out two ideas for killer apps I had. 1. Basically a front end to lilypond which will work more like a audio program. In many audio editors you can see the wav or a square block on a track. I had this idea of a notation editor that has tracks you can create your form ABA, lets say, and add markers for them. Then create motives which via midi or notation will become lilypond notation in the end. This chunk can then be put on a track. >The chunk can be displayed as a staff with the notes(graphic), as the lilypond, or just a blank track. In the same way a daw may display a chunk of audio a a rectangle or a wave. These Chunk can be copied, pasted transposed retrograded etc, new chunks could be added and manipulated. My reasoning is as follows, when will Linux shine? when it does something unique not done by others. Thats what makes jack/ardour etc so appealing. Fo notation midi input exists with rumor or a number or existing libs, creating an on the fly lilypond file is very possible, infact if the graphic (staff) representation was left off all the parts already exist. 2. This I call V.A.W it has a drawback in that the base technology is currently closed source, but this might be subject to change.. here goes a inventer I know wanted to see if it was possible to recreate what it says in the Hebrew Torah (Bible) the the Jews on Mount Sinai Roim et Ha Kolot. (they say the sounds) He created a way to translate sound waves into light waves and display them. He found some very interesting things. (Hebrew letters spoken display as the shape of the letter). I sang into his device and saw Bach and other music display via his device. All overtones are displayed and visible as different colors. The sound of a audio mix is visually open for all to see. This is very hard to grasp without seeing..... My idea is to take his algorism/app and reverse the process and have the ability to take the visual and turn it back to audio. This would be like view on midi editors with the squares you can change to effect the sound, only not midi but audio! I wrote out very detailed plans for this app, again this is something that just doesn't exist, image not having to rely soley on your ears when adding effects to a mix but being able to see how the changes you make actually effect the way it looks/sounds and I mean in detail. There are so many possibilities for this. In a regular daw your see I think only amplitude and something else (the wav display) If this one isn't clearly described I will try again. Aaron

20 years, 11 months

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Linux-audio-dev