Caution

You're reading the documentation for a development version. For the latest released version, please have a look at 0.10.1.

librosa.frames_to_samples

librosa.frames_to_samples(frames, *, hop_length=512, n_fft=None)[source]

Convert frame indices to audio sample indices.

Parameters:

framesnumber or np.ndarray [shape=(n,)]: frame index or vector of frame indices
hop_lengthint > 0 [scalar]: number of samples between successive frames
n_fftNone or int > 0 [scalar]: Optional: length of the FFT window. If given, time conversion will include an offset of n_fft // 2 to counteract windowing effects when using a non-centered STFT.

Returns:

timesnumber or np.ndarray

time (in samples) of each given frame number:

times[i] = frames[i] * hop_length

See also

frames_to_time: convert frame indices to time values
samples_to_frames: convert sample indices to frame indices

Examples

>>> y, sr = librosa.load(librosa.ex('choice'))
>>> tempo, beats = librosa.beat.beat_track(y=y, sr=sr)
>>> beat_samples = librosa.frames_to_samples(beats, sr=sr)