librosa.core.clicks¶
-
librosa.core.
clicks
(times=None, frames=None, sr=22050, hop_length=512, click_freq=1000.0, click_duration=0.1, click=None, length=None)[source]¶ Returns a signal with the signal
click
placed at each specified timeParameters: - times : np.ndarray or None
times to place clicks, in seconds
- frames : np.ndarray or None
frame indices to place clicks
- sr : number > 0
desired sampling rate of the output signal
- hop_length : int > 0
if positions are specified by frames, the number of samples between frames.
- click_freq : float > 0
frequency (in Hz) of the default click signal. Default is 1KHz.
- click_duration : float > 0
duration (in seconds) of the default click signal. Default is 100ms.
- click : np.ndarray or None
optional click signal sample to use instead of the default blip.
- length : int > 0
desired number of samples in the output signal
Returns: - click_signal : np.ndarray
Synthesized click signal
Raises: - ParameterError
- If neither times nor frames are provided.
- If any of click_freq, click_duration, or length are out of range.
Examples
>>> # Sonify detected beat events >>> y, sr = librosa.load(librosa.util.example_audio_file()) >>> tempo, beats = librosa.beat.beat_track(y=y, sr=sr) >>> y_beats = librosa.clicks(frames=beats, sr=sr)
>>> # Or generate a signal of the same length as y >>> y_beats = librosa.clicks(frames=beats, sr=sr, length=len(y))
>>> # Or use timing instead of frame indices >>> times = librosa.frames_to_time(beats, sr=sr) >>> y_beat_times = librosa.clicks(times=times, sr=sr)
>>> # Or with a click frequency of 880Hz and a 500ms sample >>> y_beat_times880 = librosa.clicks(times=times, sr=sr, ... click_freq=880, click_duration=0.5)
Display click waveform next to the spectrogram
>>> import matplotlib.pyplot as plt >>> plt.figure() >>> S = librosa.feature.melspectrogram(y=y, sr=sr) >>> ax = plt.subplot(2,1,2) >>> librosa.display.specshow(librosa.power_to_db(S, ref=np.max), ... x_axis='time', y_axis='mel') >>> plt.subplot(2,1,1, sharex=ax) >>> librosa.display.waveplot(y_beat_times, sr=sr, label='Beat clicks') >>> plt.legend() >>> plt.xlim(15, 30) >>> plt.tight_layout()