1. Shazam -Abdulshafil Ahmed -Steven Lewis -Rick Huang

2. What is Shazam? - Mobile phone based application that listens to music and compares against a database.

3. Technology Takes 10 second sample Catalogs the spectrogram (fingerprint) Compares against large database If match is found, – Gives song information – Offers immediate purchase

4. Technology Pair of peaks: peak + anchor Hash table searching O(l), collision reduced by having extra key by orders of magnitude Robustness to interference?

5. Societal Impact Introducing people to new music. Hear a song once, have it forever

6. Economic Impact Improves music sales Music sales are a convenient impulse buy More efficient advertisement of music. http://www.youtube.com/watch?v=ppJAkN4 m9bY

7. Conclusion Turns the world into a record store

8. References http://www.shazam.com/music/web/home.ht ml http://www.shazam.com/music/web/home.ht ml http://en.wikipedia.org/wiki/Hash_function http://laplacian.wordpress.com/2009/01/10/h ow-shazam-works/ http://laplacian.wordpress.com/2009/01/10/h ow-shazam-works/