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

2004-04-06 Thread Tim Goetze
[Florian Schmidt] >On Tue, 6 Apr 2004 10:36:51 +0100 >Steve Harris <[EMAIL PROTECTED]> wrote: > >> Theres info about this on Stephan's website: >> http://www.dspdimension.com/start.html >> >> Its not that simple - but thats the basic idea. > >Thanks! I'll have a look.. please let me throw in that

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

2004-04-06 Thread Florian Schmidt
On Tue, 6 Apr 2004 10:36:51 +0100 Steve Harris <[EMAIL PROTECTED]> wrote: > Theres info about this on Stephan's website: > http://www.dspdimension.com/start.html > > Its not that simple - but thats the basic idea. Thanks! I'll have a look.. Flo -- kT

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

2004-04-06 Thread Florian Schmidt
On Tue, 06 Apr 2004 11:51:34 +0200 Cournapeau David <[EMAIL PROTECTED]> 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 stationa

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

2004-04-06 Thread Cournapeau David
I forgot to add that there is a matlab script which does the basic phase vocoder stuff on musicdsp.org. As I am the one who writes this script, I can help you if you have any questions ;). As the script only uses the matlab language and fft, it should run on scilab and/or octave, but I haven't

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 Steve Harris
On Tue, Apr 06, 2004 at 11:28:28 +0200, Florian Schmidt wrote: > On Tue, 6 Apr 2004 07:33:50 +1000 > Erik de Castro Lopo <[EMAIL PROTECTED]> wrote: > > > On Tue, 06 Apr 2004 00:59:39 +0200 > > Marek Peteraj <[EMAIL PROTECTED]> wrote: > > > > > Hi Erik, > > > > > > On Mon, 2004-04-05 at 22:25, Er

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

2004-04-06 Thread Florian Schmidt
On Tue, 6 Apr 2004 07:33:50 +1000 Erik de Castro Lopo <[EMAIL PROTECTED]> wrote: > On Tue, 06 Apr 2004 00:59:39 +0200 > Marek Peteraj <[EMAIL PROTECTED]> wrote: > > > Hi Erik, > > > > On Mon, 2004-04-05 at 22:25, Erik de Castro Lopo wrote: > > > > > > There are other people working on something

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] Pitchshift/Timestretch project..

2004-04-05 Thread Conrad Parker
On Tue, Apr 06, 2004 at 08:38:09AM +1000, Erik de Castro Lopo wrote: > On Tue, 6 Apr 2004 00:07:08 +0200 > Christian Schoenebeck <[EMAIL PROTECTED]> 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 t

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

2004-04-05 Thread Vincent Touquet
On Tue, Apr 06, 2004 at 12:07:08AM +0200, 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 q

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

2004-04-05 Thread Erik de Castro Lopo
On Tue, 6 Apr 2004 00:07:08 +0200 Christian Schoenebeck <[EMAIL PROTECTED]> 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

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

2004-04-05 Thread Christian Schoenebeck
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, But I also planned to do some re

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

2004-04-05 Thread Erik de Castro Lopo
On Tue, 06 Apr 2004 00:59:39 +0200 Marek Peteraj <[EMAIL PROTECTED]> wrote: > Hi Erik, > > On Mon, 2004-04-05 at 22:25, Erik de Castro Lopo wrote: > > > > There are other people working on something like this. > > Could you reveal some details? :) Well me. I've been working on this since the s

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

2004-04-05 Thread Marek Peteraj
Hi Erik, On Mon, 2004-04-05 at 22:25, Erik de Castro Lopo wrote: > On Mon, 5 Apr 2004 15:08:08 +0200 > Frank NEUMANN <[EMAIL PROTECTED]> wrote: > > > > > Hi all, > > > > I was made aware of a new project yesterday, to be found at > > http://clearscale.org. The idea is to produce a commercial-gr

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

2004-04-05 Thread Erik de Castro Lopo
On Mon, 5 Apr 2004 15:08:08 +0200 Frank NEUMANN <[EMAIL PROTECTED]> wrote: > > Hi all, > > I was made aware of a new project yesterday, to be found at > http://clearscale.org. The idea is to produce a commercial-grade and open- > source pitchshifting/timestretching library. There are other peo

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

2004-04-05 Thread Frank NEUMANN
Hi all, I was made aware of a new project yesterday, to be found at http://clearscale.org. The idea is to produce a commercial-grade and open- source pitchshifting/timestretching library. libSoundtouch might be nice as it is, but if you really stress it, the artifacts come in quite quickly (in m