Subject: Re: Rhythm perception From: Luis Gustavo Martins <lmartins(at)inescporto.pt> Date: Thu, 17 Nov 2005 16:04:55 -0000A couple of additional references in this area: Fabien Gouyon, who is defending his PhD thesis on "Computational Rhythm Description" very soon, available at: http://www.iua.upf.es/~fgouyon/thesis/ and Miguel Alonso work, whose system was ranked 1st on the MIREX 2005 Audio Tempo Extraction contest: http://perso.enst.fr/~malonso/ Further references on this area can be found at the MIREX 2004 and 2005 Audio Tempo Extraction contest webpages: http://www.iua.upf.es/mtg/ismir2004/contest/tempoContest/ http://www.iua.upf.es/mtg/ismir2004/contest/rhythmContest/ http://www.music-ir.org/evaluation/mirex-results/audio-tempo/index.html Cheers, Gustavo --------------------------------------- Luis Gustavo Martins Researcher / PhD Student lmartins(at)inescporto.pt www.inescporto.pt/~lmartins INESC Porto Portugal www.inescporto.pt --------------------------------------- > -----Original Message----- > From: AUDITORY Research in Auditory Perception > [mailto:AUDITORY(at)LISTS.MCGILL.CA] On Behalf Of Michael Fulton > Sent: quinta-feira, 17 de Novembro de 2005 15:36 > To: AUDITORY(at)LISTS.MCGILL.CA > Subject: Re: [AUDITORY] Rhythm perception > > > > >We were discussing rhythm patterns the other day and the question came > >up about how one determined the start of a pattern. If there is a > >heavy emphasis on one beat of the sequence then I can understand that > >that is taken as the first beat. > > But if the sequence is unemphasised how does one decide? Or do > >people decide differently, or is it cultural? > > > >I am not sure where to start to look -- as ever this is outside my > >general field of study -- but I though this list might be the place > >to ask for clues. > > > >I hope I have explained the question sufficiently! > > > >==John ffitch > > As far as I am aware the two most successful systems to date for > extracting > information about musical measures are by Klapuri and Goto (Klapuri being > the better). These both identify the foot tapping rate or tactus as its > called and also the start of each measure. The system by Goto relied on > detecting chord changes and Klapuris system looked for rythmic > fluctatuations in the signals amplitude i.e. low,loud,-,loud. > However, both these relied on their being some form of emphasis/change and > were designed for primarily western popular music. If the sequence is > unemphasisied then I suppose it really is a purely subjective decision > based on experience and culture. > > The papers I have mentioned are > > http://www.cs.tut.fi/sgn/arg/klap/sapmeter.pdf > > and > > http://staff.aist.go.jp/m.goto/PROJ/bts.html No.9 on > page > > Hope this helps as this is also a problem that has been troubling me > recently i.e. given a peice of music how do we reliably regocnise the > start > of each measure ? > > Mick