It looks like audio device hasn't been detected. There is a "No full duplex audio device detected" message under the Audio Device drop down.
The supported drivers for audioPlayerRecorder are platform specific:
- Windows — ASIO
- Mac — CoreAudio
- Linux — ALSA
If you are using a Windows machine, the app will require an ASIO driver. You can download this driver from the following website.
Once you install this driver, you will need to restart MATLAB. You will be able to see the driver in the drop down menu once you open the app. And then you can see default values set for all the fields