Echoprint not recognizing a single song

Question

Echoprint “listens” to audio on a phone or on your computer to figure out what song it is. It does so very fast and with such good accuracy that it can identify very noisy versions of the original or recordings made on a mobile device with a lot of interference from outside sources.

I compiled the iOS example provided on the website. So far so good. Sadly, Echoprint failed to recognize any song via the iPhone's microphone (recording time up to 1 minute).

On the other hand, it was capable of recognizing songs by "uploading" them directly from the iPhone's media library.

Any idea, what the problem could be?

Answer 1

Echo print is not intended to work over the air. At least not with the given configuration. You can adapt the code, focus on the matching functions (best_match), to get some results for over-the-air configuration. The actual best_match function returns a song only if it is really close to the reference, which won't happened with songs recorded with the microphone of your phone. Also consider recording a longer segment.

Answer 2

I think the problem is the sampling rate at which the song is being recorded. If it's at 8 kHz it probably won't work; it has to be at least a minimum of 11 kHz.