| .. _usb_audio_headphones_microphone: |
| |
| USB Audio Sample Application |
| ############################ |
| |
| Overview |
| ******** |
| |
| This sample app demonstrates use of a USB Audio driver by the Zephyr |
| project. This very simple sample that performs loopback over IN/OUT |
| ISO endpoints. The device will show up as two audio devices. One |
| Input (Microphone) and one Output (Headphones) device. |
| |
| Building and Running |
| ******************** |
| |
| In order to build the sample an overlay file with required options |
| must be provided. By default app.overlay is added. An overlay contains |
| software and hardware specific information which allow to fully |
| describe the device. |
| |
| After you have built and flashed the sample app image to your board, plug the |
| board into a host device. |
| |
| Testing |
| ******* |
| |
| Steps to test the sample: |
| - Build and flash the sample as described above. |
| - Connect to the HOST. |
| - Chose default Audio IN/OUT. |
| - Start streaming audio (for example by playing an audio file on the HOST). |
| - Start recording audio stream (for example using Audacity). |
| - Verify the recorded audio stream. |
| |
| This sample can be found under |
| :zephyr_file:`samples/subsys/usb/audio/headphones_microphone` in the Zephyr project tree. |
