1st track :generate a pink noisedelete frequencies up to 2khz with the equalizershape a crescendo - decreshendo envelope. 2nd track :generate few very low frequencesmake it alternate four times betwin high and low strength with envelope toolapply a compressorput a decrescendo envelope. 3rd track :generate a 300hz sinusput an envelope with an agrssive attack and a rapid end (0. 1s length)make it correspond with the end of the second low echo (track 2)generate the same sound, lower, with a 600hz and 1200hz sinus, corresponding respectively to the third and the fourth low echo.
Author: Lecuistot