Hi Anlon,
If `license('test', 'Audio_Toolbox')` is returning `0`, it indicates that MATLAB does not recognize a valid license for the Audio Toolbox. Here are some steps you can take to resolve this issue:
1. Verify License: Ensure that you have a valid license for the Audio Toolbox. You can check your licenses by signing in to your MathWorks account on the MathWorks website.
2. Correct Toolbox Name: Make sure you are using the correct name for the toolbox in the `license` command. The correct name is case-sensitive and should match the name used by MathWorks. For example, if the toolbox is named "Audio System Toolbox", the command should be `license('test', 'Audio_System_Toolbox')`.
3. MATLAB Path: After installing the Audio Toolbox, ensure that the toolbox's functions are on the MATLAB path. You can add the toolbox directory to the MATLAB path using the `addpath` function or the Set Path dialog in MATLAB.
4. Toolbox Compatibility: Ensure that the version of MATLAB you are using is compatible with the version of the Audio Toolbox you have installed.
5. Update MATLAB: Make sure you are running the latest version of MATLAB. Sometimes, updating to the latest version can resolve licensing issues.
6. MATLAB Preferences: Sometimes, resetting MATLAB preferences to their default settings can resolve unexpected issues. Rename the preferences directory (found by running `prefdir` in MATLAB) and restart MATLAB.
I hope the above steps resolve the issue.
Thank you.
