I would like to strongly suggest to add to the working sounds alpha waves for concentration. I find that they do really help me concentrate and focus better onmy work. I tried other music or "healing sounds", they don't do the same for me. Here's an example: https://www.youtube.com/watch?v=WPni755-Krg&t=9069s

No offense, but I found the other working sounds in the application either noisy or stressful.