BPM Calculator, Computing Beats-Per-Minute
It's often useful to know the tempo of a track, represented by the number of beats per minute (BPM), so you can select tracks with similar tempos for wild parties or workouts. Only MP3, WMA, MP4 and M4A files have official tags which can contain the BPM values. Ogg and FLAC files do not have this data.
Very few music files actually have a BPM value in their information tags. You can use MuMan to find the BMP value in several ways, and add it to the library database.
The Music Library Manager has a column which shows the BPM value. This may be hidden between the 'Mood' and the 'Length' columns, see Main Window for details about un-hiding columns. You can sort by the BPM value so you can make playlists of tracks which all have a similar tempo.
1) Use the AcousticBrainz web service to find the BPM of known tracks. This feature is available from the Track Properties form, via the 'Compute BPM' button. If the BPM can be found on the web then it is filled in immediately.
2) Use the BPM calculator application to process the track. This uses a complex sound analysis algorithm to calculate the BMP value. This feature is available from the Track Properties form via the 'BPM Calculator' button. If the BPM value can't be found on the web, it runs the BPM calculator application automatically, but this can take a few minutes.
3) Use the (basic but fun) BPM Sampler application to manually determine the tempo by hitting the space bar or clicking the mouse in time with the music.
4) You can mark multiple tracks in the Tracks view and use the 'Library Management > Compute Beats-Per-Minute' context menu command to obtain the BPM value for all the marked tracks. You can use the 'Do not calculate' checkbox to force it to use only the AcousticBrainz web service, which takes about 1 second per track. If not checked, and not found on AcousticBrainz, then it will use the very slow calculator which takes some minutes per track.