BBB Audio Cape RevB Getting Started

This guide is intended to walk through the basic instructions on how to get your Audio Cape working. The instructions below are performed with following kernel and may vary for different kernel versions.

Load the device tree file
Ensure your BBB is connected to the internet. Download the provided device tree files and decompress it. You may end up doing something like this: Compile the device tree file and move it to /lib/firmware: Since this Audio Cape uses the same audio signal from the onboard HDMI interface, you need to disable the audio portion of the HDMI by edit the uEnv.txt at /boot/uboot. Add this line to the uEnv.txt file. Reboot your BBB. Log in and check the capemgr Note that the "virtual cape" BB-BONELT-HDMIN is loaded instead of the BB-BONELT-HDMI. The difference between the two "capes" is that the BB-BONELT-HDMIN does not include the audio protion. By doing this, we can now load the Audio Cape device tree: The Audio Cape is now loaded.