Surely you have asked yourself more than once: how the hell is he able to Shazam to detect what is playing and do it so quickly with the number of songs that are in the whole music industry? Obviously, it is not magic, although a highly thought out and elaborate system behind it makes it seem like it. You want to know how it works? Well, don't miss the next video.
How Shazam works, to the rhythm of Jaime Altozano
It is likely that you already know him but in case you are caught out, we tell you that Jaime Altozano is a famous Spanish disseminator and youtuber who has a well-known channel in which he talks about music. Of course, he does not dedicate himself to telling what musical groups he likes or making reactions to new video clips making faces or making fuss; instead, what he does, and masterfully, is explain how music works, why there are melodies that we find so catchy or what is the sound secret of the album badly from Rosalia or the intro of Game of Thrones. Ultimately, it helps us understand what we hear.
Thanks to his channel you can learn a lot about this art and even if you are not a musician or an expert in the field (as Jaime is), it is a fantastic way to find out about many things related to music that you will surely find useful. curious The best example? His latest video on how shazam works.
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To explain it, Jaime has based himself on the published documents by himself creador of Shazam, Avery Wang, who hasn't been shy about sharing with the world how the algorithm behind his famous music app works. From there, the youtuber is in charge of translating said knowledge into a much simpler and more understandable language, also using the support of lego pieces so that we can better grasp the concept -which is not exactly simple.
In very (very) broad strokes, what Wang has done is create a system capable of analyzing the key points of the spectrogram of sound (Fig. 1A -on these lines-) of the audio that your phone records, "pass" them to a graph (Fig. 1B) and find their "match" or coincidence in its gigantic database at breakneck speed. This system is based on a kind of "audio fingerprint", supported by data with three key aspects: a frequency recorded in a specific second of the recording, a second frequency close in time to the first, and the distance between them. these two frequencies (Fig. 1D).
Your head just exploded, right? Do not worry and, really, listen to us: when you press play and see the video and the LEGO pieces, you will understand everything. Word. Without further ado we leave you with the masterful explanation by Jaime Altozano on how Shazam works. Probably when the video ends you will not be able to reproduce such an invention, but surely you will at least feel a little wiser.