/** create beat tracking object
+ \param winlen length of the onset detection window
\param hop_size number of onset detection samples [512]
+ \param samplerate samplerate of the input signal
*/
-aubio_beattracking_t * new_aubio_beattracking(uint_t hop_size);
+aubio_beattracking_t * new_aubio_beattracking(uint_t winlen, uint_t hop_size,
+ uint_t samplerate);
/** track the beat