A DJ selects songs to play in a set. He doesn't just consider the mood or style of the club/disco. The BPM (beats-per-minute) is an important technical requirement. A song that is played simultaneously must have the same BPM.
MP3 files can have problems with their tags. You may not be able to determine if the BPM marked in the ID3 Tag is correct. It is therefore important to use an application such as BPM Analysis.
BPM Analizer lets you open a song simply by dragging it into the window. In seconds, the BPM will be displayed with amazing accuracy thanks to its sophisticated detection system.
It is also possible to search for the BPM in a complete audio library, so we can print it later on paper.