Need Dev expert for making audio and video recording in React native

I had a previous developer who made our multitrack audio and video recording studio but he left it with many problems. Audio and video recording are not working correctly, scrolling through the multip I had a previous developer who made our multitrack audio and video recording studio but he left it with many problems. Audio and video recording are not working correctly, scrolling through the multiple tracks isnt working. I should be able to record on a new track while the other audio and video tracks are playing in the backg...