Utilities¶

Array operations¶

`frame`(y[, frame_length, hop_length])	Slice a time series into overlapping frames.
`pad_center`(data, size[, axis])	Wrapper for np.pad to automatically center an array prior to padding.
`fix_length`(data, size[, axis])	Fix the length an array data to exactly size.
`fix_frames`(frames[, x_min, x_max, pad])	Fix a list of frames to lie within [x_min, x_max]
`index_to_slice`(idx[, idx_min, idx_max, ...])	Generate a slice array from an index array.
`sync`(data, idx[, aggregate, pad, axis])	Synchronous aggregation of a multi-dimensional array between boundaries
`axis_sort`(S[, axis, index, value])	Sort an array along its rows or columns.
`normalize`(S[, norm, axis])	Normalize the columns or rows of a matrix
`sparsify_rows`(x[, quantile])	Return a row-sparse matrix approximating the input x.
`buf_to_float`(x[, n_bytes, dtype])	Convert an integer buffer to floating point values.

`match_intervals`(intervals_from, intervals_to)	Match one set of time intervals to another.
`match_events`(events_from, events_to)	Match one set of events to another.

`localmax`(x[, axis])	Find local maxima in an array x.
`peak_pick`(x, pre_max, post_max, pre_avg, ...)	Uses a flexible heuristic to pick peaks in a signal.

`valid_audio`(y[, mono])	Validate whether a variable contains valid, mono audio data.
`valid_int`(x[, cast])	Ensure that an input value is integer-typed.
`valid_intervals`(intervals)	Ensure that an array is a valid representation of time intervals:

`example_audio_file`()	Get the path to an included audio example file.
`find_files`(directory[, ext, recurse, ...])	Get a sorted list of (audio) files in a directory or directory sub-tree.

`FeatureExtractor`(function[, target, iterate])	Sci-kit learn wrapper class for feature extraction methods.
`buf_to_int`(x[, n_bytes])	Convert a floating point buffer into integer values.