It's not app detecting but server and it's lack of features as it's opensource and made for free (Shazam and SoundCloud or cost money or paid by phone company to be be free in store). So instead of saying in thread (not specifically you but it's not first time here) what song doesn't work, try to contact echoprint guys and ask them how you can help and update database.

I understand that english is not your native language (as you can see neither mine) and i'm pretty sure you want to help to improve app, as well as developer wants to get feedback. But you need to provide more info (maybe you can use google translator or better ask english speaking friend to translate for you)