Audio signals

load	Load an audio file as a floating point time series.
loadx	Load an example audio file by key.
stream	Stream audio in fixed-length buffers.
resample	Resample a time series from orig_sr to target_sr
get_duration	Compute the duration (in seconds) of an audio time series, feature matrix, or filename.
get_samplerate	Get the sampling rate for a given file.
to_mono	Convert an audio signal to mono by averaging samples across channels.
to_stereo	Combine two signals into a stereo signal.
to_multi	Combine multiple signals into a multi-channel signal.
clicks	Construct a "click track".
tone	Construct a pure tone (cosine) signal at a given frequency.
chirp	Construct a "chirp" or "sine-sweep" signal.
autocorrelate	Bounded-lag auto-correlation
zero_crossings	Find the zero-crossings of a signal y: indices i such that sign(y[i]) != sign(y[j]).