Import Audio File Data in Signal Feature Extractor

R2026b

Use Signal Feature Extractor to import audio files and labeled signal sets that point to audioDatastore objects or audio files.

Note

• Importing audio file data in Signal Feature Extractor requires an Audio Toolbox™ license. For an example on how to create an audioDatastore object, see audioDatastore Object Pointing to Audio Files (Audio Toolbox).

• To update members or their sample rate once you import them into the app, start a new session and reimport the members data.

Supported Audio File Extensions

When importing audio files, Signal Feature Extractor supports single-channel and multichannel signals with the following audio file extensions:

• .aif

• .aifc

• .aiff

• .au

• .avi

• .flac

• .m4a

• .mov

• .mp3

• .mp4

• .ogg

• .opus

• .snd

• .wav

Import Audio Signals from Files or Folder

To import signals into Signal Feature Extractor from audio files or a folder containing audio files, on the Extract Features tab, click New and select From Audio Files or From Audio Folder in the Members list. In the dialog box, browse to select the audio files or folder that contains the audio signals you want to import. The app treats each imported audio file as a member from which to extract features. All members to import must use a file extension listed in Supported Audio File Extensions.

Note

Importing labeledSignalSet objects using From Audio Files or From Audio Folder is not supported. To import a labeledSignalSet object, load it into the MATLAB^® Workspace and import it from there.

Import labeledSignalSet from MATLAB Workspace

To import a labeledSignalSet object into Signal Feature Extractor from the MATLAB Workspace, on the Extract Features tab, click New and select From Workspace in the Members list. In the dialog box, select the labeledSignalSet object you want to import. The app treats each audio signal in the labeledSignalSet object as a member of the labeled signal set from which to extract features.