Create pulse animation and beating heart

You can also do Karaoke.

I don’t know anything about music, but for a friend I did a test in 2018.
There are also some links.

A simple test result (Firefox only) is in the Collection of examples from discourse.threejs.org

see https://hofk.de/main/discourse.threejs/2018/Xindex2018.html

see Audio Recording Audio Recorder