Some time ago I wrote this little script (I called it beatcalculator).
Pretty straightforward command line utility, use the switch –help to get help.
Here is the script, exported from emacs with htmlize-buffer: beatcalculator.
Copy and paste this code into a file called beatcalculator, put that file in your $PATH and give it execution privileges with chmod +x.
Then you can use it on the command line as simple calculator, providing the bpm you want to examine, or you can ask to analyze a wave file. you have to specify the number of bars contained in the wav file and optionally the meter (defaults to 4/4)
Here’s an example of the output you get (with a file with 2 bars of music):
$ beatcalculator -f afroeira123.6.wav -B 2
Meter is 4/4
---------------------------------------------------------------------------
afroeira123.6.wav is 3883 milliseconds
Bpm of afroeira123.6.wav is 123.62
123.62 beats per minute (bpm):
Note Delay time LFO freq
---------------------------------------------------------------------------
Whole 1941.433 ms 0.52 Hz
Dotted Half 1456.075 ms 0.69 Hz
Half 970.717 ms 1.03 Hz
Dotted Quarter 728.038 ms 1.37 Hz
Quarter 485.358 ms 2.06 Hz
Dotted Eight 364.019 ms 2.75 Hz
Quarter Triplet 323.579 ms 3.09 Hz
Eight 242.679 ms 4.12 Hz
Dotted Sixteenth 182.009 ms 5.49 Hz
Eight Triplet 161.78 ms 6.18 Hz
Sixteenth 121.34 ms 8.24 Hz
Dotted Thirty Second 91.005 ms 10.99 Hz
Sixteenth Triplet 80.9 ms 12.36 Hz
Thirty Second 60.67 ms 16.48 Hz
Hope you enjoy it.
Send me comments and suggestions to improve it.
linuxaudiostudio 