BTrack - A Real-Time Beat Tracker
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A real-time beat tracker, implemented in C++.
Written by Adam Stark, Matthew Davies and Mark Plumbley.
BTrack is made available under the GNU General Public License, version 3. Please see the included LICENSE.txt for more details.
STEP 1
Include the BTrack header file as follows:
#include "BTrack.h"
STEP 2
Instantiate the algorithm by one of the following:
// to use the default 512 hop size and 1024 frame size BTrack b;
or:
// to specify a hop size (e.g. 512) and have a frame size of 2 x the hop size BTrack b(512);
or:
// to specify both the hop size and frame size BTrack b(512,1024);
STEP 3.1 - Audio Input
In the processing loop, fill a double precision array with one frame of audio samples (as determined in step 2):
double *frame; // ! // do something here to fill the frame with audio samples // !
and then call:
b.processAudioFrame(frame);
and to check for beats, simply call:
if (b.beatDueInCurrentFrame()) { // do something on the beat }
STEP 3.2 - Onset Detection Function Input
The algorithm can process onset detection function samples. Given a double precision onset detection function sample called 'newSamples', at each step, call:
b.processOnsetDetectionFunctionSample(newSample);
and then check for beats with:
if (b.beatDueInCurrentFrame()) { // do something on the beat }
For any questions, please email Adam Stark (email at http://www.adamstark.co.uk).