[dawnerd]

I'd be more curious to see you try to build this in an afternoon.

Also, it works a lot better than being able to find "slightly distorted" versions. It can catch a song in a noisy room where you can barely make out the song to begin with. Couple months back it found a song when there was a very loud crowd yelling over it. They're also able to determine differences between versions of songs pretty well. Some remixes might sound very close to the original.

Other thing you might be missing is just how fast it is even on a slow mobile connection.

[amelius]

(removed explanation because it seems not appreciated)

[vedant]

This is a heap of nonsense. Not only does this summarily dismiss the enormous challenges in digital signal processing required for removing arbitrary background audio, it exposes some confusion associated with the ideas of correlated random variables, inner products, and affine transformations.

[amelius]

> it exposes some confusion associated with the ideas of correlated random variables, inner products

Read this article, then come back: [1]

[1] https://en.wikipedia.org/wiki/Cross-correlation

[xapata]

> (removed explanation because it seems not appreciated)

I think describing the reaction as lack-of-appreciation is a bit misleading. Perhaps disbelief might be a better description.

[amelius]

For the wrong reasons. See my response.

[xapata]

Since you deleted the original comment, it's hard to evaluate it. I think you should have left it there.

[mmmmmbop]

So they're doing this vector correlation for every song in their database (40 million)?