Midomi Music - It can help you find this song if you hum a few lines to your computer.

On weekdays, you often hear music that you like but don't know the title of, and it seems impossible to search for it online. Without knowing the name, how can you search? No matter how large the search database is, it's useless in this case. Tools like Mixturtle, Mucelli, Songza, SeeqPod, Music Musgle, gimado, Spool.fm, Woonz, TinySong, and Songbeat—these renowned music search engines on the internet—can't help you either. In this situation, what you should consider is midomi. Strictly speaking, midomi isn't a professional search engine; it has a certain community aspect. However, the reason I bring it up today is because of midomi's unique feature. Besides the regular keyboard-based keyword search, it also provides a voice-based search function. This means you can sing the tune with your voice, and the system will analyze and search, then list out the results you need.