I did this for a NYE party a few years ago.
Take a look at my approach if you like. Would be happy to get any feedback you might have.
I used a few audio reactive shaders and it all worked fairly well on the night.
edit: I’ve just realised this was an early version, and I hadn’t mapped my LEDs at this stage. Also, I’d like to note the shaders I used were taken from shadertoy.com and were only slightly modified, so cannot take any credit for them. I can’t see where I credited the original artist, and it looks like they may have removed the work. If I can find links to the originals I will update this post.
editedit: Here’s a video of the (near) final version - https://youtu.be/4A12Sklf044