C++ / Python library for signal processing and tempo information extraction.
MP3, FLAC and WAV audio formats are supported.
libtempo [audio] {OPTIONS} OPTIONS:
-h, --help Display the help menu
Basic
-t[preferred_bpm],
--preferred_bpm=[preferred_bpm] (Default: 130) BPM around which the
real bpm will be chosen.
--bpm_rounding_precision=[bpm_rounding_precision]
(Default: 0.500000) Precision of the
BPM before correction..
-s[smooth_length],
--smooth_length=[smooth_length] (Default: 20.000000) Length in seconds
over which the tempogram will be
stabilized to extract a steady tempo.
-l[min_section_length],
--min_section_length=[min_section_length]
(Default: 10.000000) Minimum length
for a tempo section in seconds.
--max_section_length=[max_section_length]
(Default: 40.000000) Maximum section
length in seconds after which section
is split in half.
Advanced
--bpm_window=[bpm_window] BPM range which to check for tempo
peaks.
-m[tempo_multiples...],
--tempo_multiples=[tempo_multiples...]
Tempo multiples to consider when
searching for correct offset
--ref_tempo=[ref_tempo] (Default: 60) Reference tempo defining
the partition of BPM into tempo
octaves for calculating cyclic
tempogram.
--tempo_window=[tempo_window] (Default: 8) Analysis window length in
seconds for calculating tempogram.
--octave_divider=[octave_divider] (Default: 120) Number of tempo classes
used for representing a tempo octave.
This parameter controls the
dimensionality of cyclic tempogram.
--triplet_weight=[triplet_weight] (Default: 3.000000) Weight of the
triplet intensity which will be adeed
to its base intensity.
--bpm_doubt_window=[bpm_doubt_window]
(Default: 2.000000) Window around
candidate bpm which to search for a
more fine and correct bpm.
--bpm_doubt_step=[bpm_doubt_step] (Default: 0.100000) Steps which to
take inside the doubt window to fine
tune the bpm.
--click_track_subdivision=[click_track_subdivision]
(Default: 8) Click subdivision for the
click track.
Output Flags
-c[generate_click_track],
--generate_click_track=[generate_click_track]
(Default: 1) Wether or not a click
track should be generated
-o, --osu Wether or not to generate tempo data
in osu format.
--viz Saves a html file with useful graphs.
-d, --dump Dump generated tempograms and novelty
curves into a file.
audio Audio file to extract tempo of.
"--" can be used to terminate flag options and force all following
arguments to be treated as positional options
- BPM calculated is the percieved bpm. There is also real bpm which may be twice as high. (I would love to hear any suggestions how this could be helped)
- Pars where bpm is constantly changed are rounded away when making secions.
- Sometimes offset might be shifted by a 1/4th or 1/8th note.