base_features.py 文件源码

def get_beats(x, sr):
    """Track beats in an audio excerpt, using librosa's standard
        beat tracker.

    Args:
        x (1d-array) audio signal, mono
        sr (int): sample rate

    Returns:
        2d-array: beat times and beat intervals
    """

    _, beat_frames = librosa.beat.beat_track(x, sr=sr)
    beat_times = librosa.frames_to_time(beat_frames, sr=sr)

    t = beat_times[:-1,]
    beat_intervals = np.diff(beat_times)

    return t, beat_intervals