4 ms·

The acoustic signature would be generated by the client, then matched by the server. A bit more work than comparing tags, but not particularly onerous.

• brianpan 11y ago
  Not onerous? For what size libraries? For your iPhone? For a 3 year-old iPod Touch? My iPhone 5 was trying to process photos in the background last night and my Twitter app stopped responding to touches. The keyboard was lagging by 30-60 seconds. Are you sure acoustic signatures will not be particularly onerous?
  • Zikes 11y ago
    https://www.apple.com/itunes/itunes-match/ https://www.apple.com/itunes/itunes-match/ Pretty sure, yeah.
  • duskwuff 11y ago
    iOS devices never need to generate those signatures, as there's no way to add new tracks to your iTunes library from them.