Simple Sound Manipulation

This is the original .wav sound original
This function takes the original sound and a factor it should change the volume of the sound by. This .wav is multiplied by 3 changeVolume

This function takes the first half of the samples and increases the volume, then decreases the volume of the second half

increaseAndDecrease
This function recues the sourceIndex by 1, which moves it from the end of the array to the beginning, making the sound backwards backwards
This function takes every smple twice to make the wavelength twice as long which halves the frequency halfFrequency
This function takes every other sample which makes the wavelength half as long and doubles the frequency doubleFrequency