Here is a version of Debussy's prelude: "La cathédrale engloutie", with a special timbre (kind of mixture between bell and organ) with intends to reinforce the feeling of being inside water. The .wav file of the timbre has been fully computed in scilab then used as a sample. I have added a few effects with audacity. A previous version, illustred with synthesia instead of the score and uploaded in 2014, has reached 5000 views.