Re: [linux-audio-dev] jack_process and pitch-shifting

2005-04-24 Thread Cournapeau David
Erik de Castro Lopo wrote: On Fri, 22 Apr 2005 19:48:47 +0200 Olivier Guilyardi <[EMAIL PROTECTED]> wrote: About vary speed : I could use libsoundtouch instead of libsamplerate, but I'm not sure the former can compare to the later's quality. Last time I looked, libsoundtouch used linear in

Re: [linux-audio-dev] mp3 fft with python

2004-08-18 Thread Cournapeau David (ENST)
michael tewner wrote: For my college final project, I'm embarking on a very similar idea. My project advisor has me implementing a wavelet transform in python, and displaying a waterfall in tcl/tk. GRanted, I've never programmed in either language; I'm not even sure either of those are efficient e

Re: [linux-audio-dev] [OT] marketing hype

2004-06-11 Thread Cournapeau David
Steve Harris wrote: On Fri, Jun 11, 2004 at 07:15:24AM -0500, Jan Depner wrote: The average age of linux audio hackers does seem to be unusually high. No idea why. Maybe you get to a certain age before the insanity kicks in ;) - Steve, beginner with only 17 years programming experience There is at

Re: [linux-audio-dev]Using python for small multimedia app ?

2004-06-07 Thread Cournapeau David
RTaylor wrote: On 2004-06-03 14:54:56 + Cournapeau David <[EMAIL PROTECTED]> wrote: I am discovering python, having looked for a matlab-like environement. I am wondering now if it is possible to do some small multimedia applications with it; more precisely, I would like to dev

[linux-audio-dev]Using python for small multimedia app ?

2004-06-03 Thread Cournapeau David
Hi there, I am discovering python, having looked for a matlab-like environement. I am wondering now if it is possible to do some small multimedia applications with it; more precisely, I would like to develop a scientific application for audio/video analysis. Basically, I need to show an avi vi

Re: [linux-audio-dev] Re: PdDSP?

2004-04-08 Thread Cournapeau David
Mr.Freeze wrote: Heya, Frank Barknecht wrote: Sukandar Kartadinata ist working on something like this for some time now. See http://glui.de/proj/gluiph.html for a general project description (careful, psycedelic website!) and this PDF: Interesting! You could start with the PD for PDA

[linux-audio-dev] Thread programming issues, hints and links wanted

2004-04-07 Thread Cournapeau David
Hi there, Beginning to play with some code in linux plateform for audio, I face a major problem: I have a very weak understanding of thread programming. I know the basic concepts (thread principle, mutex and lock), but fail to use them effectively. I found a lot of links on thread programming,

Re: [linux-audio-dev] How hard is it to write a pitch shifter?

2004-04-07 Thread Cournapeau David
Erik de Castro Lopo wrote: But I cant find out how to deal with the missing data that is removed - to keep the original length. Changing the pitch without changing the length is true pitch shifting. The code and concepts required to do this well is extremely complicated. To do it well is

Re: [linux-audio-dev] Pitchshift/Timestretch project..

2004-04-06 Thread Cournapeau David
x27;t tried myself. cheers, David Cournapeau David wrote: Well, kind of. The idea of the phase vocoder, which more or less describes what you said, is to decompose each time-domain frame into N frequency bins, and to suppose that there is only one underlying stationary sinusoidal in each freq

Re: [linux-audio-dev] Pitchshift/Timestretch project..

2004-04-06 Thread Cournapeau David
Florian Schmidt wrote: I've only been thinking about how this is done for very short periods of time. My naive approach to timestretching would be to transform the signal into the frequency domain [either by windowe fourier or by wavelet transform]. and then afterwards retransform, but with a chan

Re: [linux-audio-dev] Pitchshift/Timestretch project..

2004-04-06 Thread Cournapeau David
Christian Schoenebeck wrote: Es geschah am Montag, 5. April 2004 23:33 als Erik de Castro Lopo schrieb: Well me. I've been working on this since the start of the year, but been thinking about the problem for over 10 years. Which brings me to the question: how old are you? :P Just kidding,

Re: [linux-audio-dev] RME totalyser clone ?

2004-03-22 Thread Cournapeau David
Meterbridge has a goniometer (though I never knew thats what they were called :), http://plugin.org.uk/meterbridge/ aka "Jellyfish" Meter. Thanks for the link If youre confortable with DSP code and not UI code I would recommend some other project, the UI part of meters is much harder than the

Re: [linux-audio-dev] RME totalyser clone ?

2004-03-20 Thread Cournapeau David
Jan Depner wrote Take a look at JAMin (http://jamin.sourceforge.net). We don't have the goniometer but we do have the spectrum (in two versions). looks great, kind of what I'd like to do. But if I want to make it works on windows, I cannot use directly JAMin. Because of windows, I'd like to us

[linux-audio-dev] RME totalyser clone ?

2004-03-20 Thread Cournapeau David
Hi there, I am currently a DSP student, and want to program some stuff to improve my programming skills on linux plateform. As several musicians friends told me they would want a RME totalyser -like software (see http://www.rme-audio.com/english/analyzer/totalyser.htm), I'd like to start wi

Re: [linux-audio-dev] ableton live

2003-07-05 Thread Cournapeau David
Frank Barknecht wrote: Hallo, Adrian Gschwend hat gesagt: // Adrian Gschwend wrote: But as far as I know timestreching algorithms are 1. not easy to implement and 2. not open source if they sound good :) I'm quite sure, that Live uses a granular approach. If you timestretch far away from t