sig.play

Certain classes of temporal data can be sonified:

For sig.signal objects: the waveform is directly played, and

• if the audio waveform is segmented (using sig.segment), segments are played successively with a short burst of noise in-between;
• if the audio waveform is decomposed into channels (using sig.filterbank), channels are played successively from low to high register;
• if the audio is decomposed into frames (using sig.frame), frames are played successively;

File name(s) or the 'Folder' keyword: same behavior than for sig.Signal objects;

sig.Envelope objects (frame-decomposed or not) are sonified using a white noise modulated in amplitude by the envelope. If peaks have been picked on the envelope curve (using sig.peaks), they are sonified using a short impulse sound;

sig.pitch results: each extracted frequency is sonified using a sinusoid.

Frame decomposition

sig.play(…,'Frame',…) performs first a frame decomposition, with by default a frame length of 50 ms and half overlapping. For the specification of other frame configuration using additional parameters, cf. the previous SigFrame vs. ‘Frame' section.

Options (not available yet)

• sig.play(…,'Channel',i) plays the channel(s) of rank(s) indicated by the array i.

• sig.play(…,'Segment',k) plays the segment(s) of rank(s) indicated by the array k.

• sig.play(…,'Sequence',l) plays a sequence of audio files using the order indicated by the array l.

• sig.play(…,'Increasing',d) plays the sequences in increasing order of d, which can be either an array of number or a sig.scalar data (i.e., a scalar data returned by sig.toolbox).

• sig.play(…,'Decreasing',d) plays the sequences in decreasing order of d, which can be either an array of number or a sig.scalar data (i.e., a scalar data returned by sig.toolbox).

• sig.play(…,'Every',s) plays every s sequence, where s is a number indicating the step between sequences.

• sig.play(…,'Burst','No') toggles off the burst sound between segments.

Example

e=sig.envelope('Folder');

sig.play(e)



rms=sig.rms('Folder');



sig.play(e,'increasing',rms,'every',5)