No sound coming through Bluetooth Speaker

Hi everyone!

I set up Bluetooth on my Rock Pi 4 running Debian 9 using the guide here: https://wiki.radxa.com/Rockpi4/Debian. I was able to pair an external speaker to the Rock Pi 4 but when I tried to play music or a YouTube video, no sound came out. I used an aux cord to another speaker and sound came out so the Rock Pi 4 has audio. I’ve also paired the Bluetooth speaker to my phone and it works perfectly. The speaker also gives an audio cue when it pairs and it chimed when I paired it to the Rock Pi 4. Is there something I need to do to get sound to work? Thanks!

Jon