Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Ross Bencina
robert bristow-johnson wrote: you can have a periodic (or quasi-periodic) signal with absolutely no energy at harmonic #1 (what i would call the fundamental), and as long as it has energy in most other odd harmonics, the autocorrelation function will work just as well. there will still be pe

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread robert bristow-johnson
On Nov 26, 2010, at 1:01 AM, Ross Bencina wrote: Element Green wrote: I would think autocorrelation or something like that would provide the location and size of the loop, so I don't see the need for a pitch detection algorithm. Or am I overlooking something? Peaks in the ACF might be goo

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Ross Bencina
Element Green wrote: I would think autocorrelation or something like that would provide the location and size of the loop, so I don't see the need for a pitch detection algorithm. Or am I overlooking something? Peaks in the ACF might be good loop candidates but won't necessarily all be multip

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread robert bristow-johnson
On Nov 25, 2010, at 11:40 PM, Element Green wrote: On Wed, Nov 24, 2010 at 9:51 PM, Didier Dambrin wrote: IMHO "finding loop points" is the wrong problem to solve, it's better to "make something loop" instead, as (ideally) you're only gonna find the least bad loop points, nothing guarant

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Element Green
On Thu, Nov 25, 2010 at 4:43 AM, Ross Bencina wrote: > Element Green wrote: >> >> I'm the author of a SoundFont instrument editing application called >> Swami (http://swami.sourceforge.net).  A while back an interested >> developer added a loop finding algorithm which I integrated into the >> appl

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Element Green
On Thu, Nov 25, 2010 at 4:05 AM, Sebastian Stober wrote: > Hi Joshua, > > you might be interested in this blog post: > http://runningwithdata.tumblr.com/post/597154309/earworm-capsule > about a graph-based approach. > > Best regards, > Sebastian > Does indeed sound like an interesting project. F

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Element Green
On Thu, Nov 25, 2010 at 2:14 AM, Johannes Kroll wrote: > On Thu, 25 Nov 2010 06:51:03 +0100 > "Didier Dambrin" wrote: > >> IMHO "finding loop points" is the wrong problem to solve, it's better to >> "make something loop" instead, as (ideally) you're only gonna find the least >> bad loop points, n

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Element Green
Hello Didier, On Wed, Nov 24, 2010 at 9:51 PM, Didier Dambrin wrote: > IMHO "finding loop points" is the wrong problem to solve, it's better to > "make something loop" instead, as (ideally) you're only gonna find the least > bad loop points, nothing guarantees that there's anything loopable. > I

[music-dsp] 2nd call for participation to SMC2011 - Call for Music

2010-11-25 Thread federico avanzini
[Apologies for cross-postings] [Please distribute] 8th Sound and Music Computing Conference 06-09 July 2011, Padova, Italy Department of Information Engineering, University of Padova Conservatorio Cesare Pollini, Padova http://smc2011.smcnetwork.org/ The SMC Conference is the forum for internati

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Ross Bencina
Element Green wrote: I'm the author of a SoundFont instrument editing application called Swami (http://swami.sourceforge.net). A while back an interested developer added a loop finding algorithm which I integrated into the application. This feature is supposed to generate a list of start/end lo

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Sebastian Stober
Hi Joshua, you might be interested in this blog post: http://runningwithdata.tumblr.com/post/597154309/earworm-capsule about a graph-based approach. Best regards, Sebastian -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book r

Re: [music-dsp] Algorithms for finding seamless loops in audio

2010-11-25 Thread Johannes Kroll
On Thu, 25 Nov 2010 06:51:03 +0100 "Didier Dambrin" wrote: > IMHO "finding loop points" is the wrong problem to solve, it's better to > "make something loop" instead, as (ideally) you're only gonna find the least > bad loop points, nothing guarantees that there's anything loopable. > I would us