In article <b816ca1f-816a-4180-b28c-efc72e3d79d3@z6g2000pre.googlegroups.com>, 4phun <vic.healey@gmail.com> wrote: > On Dec 30, 5:54 am, MC <copes...@mapca.inter.net> wrote: > > This enquiring mind wants to know! > > > > It seems like magic. > > > > But something tells me it isn't. > > > > -- > > > > I love words. > >  - Susannah McCorkle > > Shazam analyzes the song and uses an acoustic fingerprint that it > compares to a music database to determine a match. > > It could generate an acoustic fingerprint using any of the following > well known audio features: Fourier coefficients, Mel Frequency > Cepstral Coefficients (MFFC), spectral flatness, sharpness, Linear > Predictive Coding (LPC) coefficients and others. Also derived > quantities such as derivatives, means and variances of audio features > could be used. The extracted features are mapped into a more compact > representation by using classification algorithms, such as Hidden > Markov Models, or quantization… > > Does that answer your question Susannah? What's most interesting about it is that it doesn't require the song to be played at the beginning, so it must have the capability of searching through songs at least to some degree. Most "songs" have a AABA pattern, where the beginning part is different from the "bridge" part, sometimes both in key an tempo. There has to be someway of syncronising the music "snippet" that's sampled off the iphone with the music library. Conceivably, one could analyze the music looking for downbeats and sync on those, but that might be hard with some music that doesn't have an easily recognizable downbeat (like say, pizzicato sections). As far as I know, it only finds things that are in the iTunes music library, so they have a vast supply of songs to refer to. It also seems to work better with vocals - having more trouble on the instrumental only portion. Maybe there's something in their Spotlight techology that they can use to get digital fingerprints of segments of the music. -Owen archived from misc.phone.mobile.iphone

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On 2008-12-31, O <owenx@denofinequityx.com> wrote: > As far as I know, it only finds things that are in the iTunes music > library I think that's extremely unlikely - Shazam has been around since 2002, whereas the iTunes Music Store has only been around since 2003. There is no link I am aware of between Apple and Shazam, the iPhone app is just one of several ways to access their service. archived from misc.phone.mobile.iphone

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In article <slrnglnsq3.te1.jon+usenet@snowy.squish.net>, Jon Ribbens <jon+usenet@unequivocal.co.uk> wrote: > On 2008-12-31, O <owenx@denofinequityx.com> wrote: > > As far as I know, it only finds things that are in the iTunes music > > library > > I think that's extremely unlikely - Shazam has been around since 2002, > whereas the iTunes Music Store has only been around since 2003. There > is no link I am aware of between Apple and Shazam, the iPhone app is > just one of several ways to access their service. The only reason I said that is that there's a link on the iPhone Shazam to get the song from the iTunes Music Store. Having looked at their web page, you're probably correct in that there's probably not a connection. -Owen archived from misc.phone.mobile.iphone

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"O" <owenx@denofinequityx.com> wrote in message news:311220082104141727%owenx@denofinequityx.com... > In article <slrnglnsq3.te1.jon+usenet@snowy.squish.net>, Jon Ribbens > <jon+usenet@unequivocal.co.uk> wrote: > >> On 2008-12-31, O <owenx@denofinequityx.com> wrote: >> > As far as I know, it only finds things that are in the iTunes music >> > library >> >> I think that's extremely unlikely - Shazam has been around since 2002, >> whereas the iTunes Music Store has only been around since 2003. There >> is no link I am aware of between Apple and Shazam, the iPhone app is >> just one of several ways to access their service. > > The only reason I said that is that there's a link on the iPhone Shazam > to get the song from the iTunes Music Store. Having looked at their > web page, you're probably correct in that there's probably not a > connection. I use the Cingular version of Shazam on my Windows Mobile phone, and it links to AT&T's Napster WAP page to purchase instead. I suspect each version of Shazam simply links to whoever's service that version of Shazam is customized for, with Shazam getting whatever appropriate sales commission is offered. archived from misc.phone.mobile.iphone

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Jon Ribbens <jon+usenet@unequivocal.co.uk> wrote: > how on earth they get a copy of > every-song-ever-released in order to get a fingerprint of them they don't. I've got dozens of songs which are not recognized by Shazam (and also not by Midomi). Most of those are without human voices... Hmm, I have yet to find an instrumental song which IS recognized at all. -- In a world without walls and fences, who needs windows and gates? archived from misc.phone.mobile.iphone

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