[LAD] Leslie and convolution

2012-07-26 Thread Julien Claassen
Hello everyone! I have just asked myself, if it is a good idea to use an IR of a Leslie for simulating a Leslie. Correct me, if I'm bloody stupid, but working on the basics of convolution, it doesn't look promising. Since you take the IR of the Leslie and then apply the full IR to each

Re: [LAD] Leslie and convolution

2012-07-26 Thread Florian Paul Schmidt
Convolution with a constant convolution kernel (constant over time) gives you the response of a time-invariant system to the input signal. A Leslie is clearly not time-invariant.. Flo On 07/26/2012 06:51 PM, Julien Claassen wrote: Hello everyone! I have just asked myself, if it is a good

Re: [LAD] Leslie and convolution

2012-07-26 Thread Julien Claassen
Hello Flo! OK, I'm with you so far. So I suppose, that it is possible to process the IR of a time-variant system. The question is: Is it done in any library already optimised for the audio domain? Thanks and best wishes Julien =-=-=-=-=-=-=-=-=-=-=-=- Such Is Life: Very

Re: [LAD] Leslie and convolution

2012-07-26 Thread Florian Paul Schmidt
On 07/26/2012 07:04 PM, Julien Claassen wrote: Hello Flo! OK, I'm with you so far. So I suppose, that it is possible to process the IR of a time-variant system. The question is: Is it done in any library already optimised for the audio domain? Thanks and best wishes Julien I

Re: [LAD] Leslie and convolution

2012-07-26 Thread Julien Claassen
Hello again! So the very short answer would be: It's not been done inany Linux software yet. Thanks for the explanations. I have thought a little too simple it seems and the outcome is what I originally expected. No go. :-) Kindly yours Julien =-=-=-=-=-=-=-=-=-=-=-=- Such Is

Re: [LAD] Leslie and convolution

2012-07-26 Thread Gene Heskett
On Thursday 26 July 2012 13:37:45 Julien Claassen did opine: Hello again! So the very short answer would be: It's not been done inany Linux software yet. Thanks for the explanations. I have thought a little too simple it seems and the outcome is what I originally expected. No go. :-)

Re: [LAD] Leslie and convolution

2012-07-26 Thread Julien Claassen
Hi Gene! You lost me there. but it's not too important from this point onwards. My basic question was aimed at things I think I saw done once or twice and I wondered if it was a god idea. There are nice Leslies around no problem there. Well nice enough. :-) thanks and best regards

Re: [LAD] Leslie and convolution

2012-07-26 Thread Robin Gareus
On 07/26/2012 07:00 PM, Florian Paul Schmidt wrote: On 07/26/2012 06:51 PM, Julien Claassen wrote: Hello everyone! I have just asked myself, if it is a good idea to use an IR of a Leslie for simulating a Leslie. Correct me, if I'm bloody stupid, but working on the basics of convolution, it

Re: [LAD] Leslie and convolution

2012-07-26 Thread Ralf Mardorf
On Thu, 2012-07-26 at 13:49 -0400, Gene Heskett wrote: Such IC's are (or were a decade ago) available. Analog bucket brigade reminds me to ugly delay circuits, we build as children, with an entertaining noise performance :D. At all events, when building such a thing use a perfboard to ensure to

Re: [LAD] Leslie and convolution

2012-07-26 Thread Robin Gareus
On 07/26/2012 07:10 PM, Florian Paul Schmidt wrote: On 07/26/2012 07:04 PM, Julien Claassen wrote: Hello Flo! OK, I'm with you so far. So I suppose, that it is possible to process the IR of a time-variant system. The question is: Is it done in any library already optimised for the audio

Re: [LAD] Leslie and convolution

2012-07-26 Thread Fons Adriaensen
On Thu, Jul 26, 2012 at 08:14:26PM +0200, Robin Gareus wrote: On 07/26/2012 07:10 PM, Florian Paul Schmidt wrote: It's of course a tradeoff - You need quite a few IRs to make the transitions smooth.. But then it's just a matter of hacking some code around an existing convolution engine..

Re: [LAD] Leslie and convolution

2012-07-26 Thread Gene Heskett
On Thursday 26 July 2012 16:59:53 Gene Heskett did opine: On Thursday 26 July 2012 13:37:45 Julien Claassen did opine: Hello again! So the very short answer would be: It's not been done inany Linux software yet. Thanks for the explanations. I have thought a little too

Re: [LAD] Leslie and convolution

2012-07-26 Thread Gene Heskett
On Thursday 26 July 2012 17:09:03 Ralf Mardorf did opine: On Thu, 2012-07-26 at 13:49 -0400, Gene Heskett wrote: Such IC's are (or were a decade ago) available. Analog bucket brigade reminds me to ugly delay circuits, we build as children, with an entertaining noise performance :D. At all

Re: [LAD] Leslie and convolution

2012-07-26 Thread Ralf Mardorf
I can't resist: http://www.youtube.com/watch?v=Y5KaeCZ_AaY ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev

Re: [LAD] Leslie and convolution

2012-07-26 Thread Ralf Mardorf
On Thu, 2012-07-26 at 17:13 -0400, Gene Heskett wrote: On Thursday 26 July 2012 17:09:03 Ralf Mardorf did opine: On Thu, 2012-07-26 at 13:49 -0400, Gene Heskett wrote: Such IC's are (or were a decade ago) available. Analog bucket brigade reminds me to ugly delay circuits, we build as

Re: [LAD] Leslie and convolution

2012-07-26 Thread Julien Claassen
Hello Fons! Nothing technical really or perhaps it is? but is't accident sometimes a huge point of such devices? As far as I remember, it was more or less an accident, that the roland TB303 sounded that crappy, same for one guitar effects processor of the same era, but exactly these