All of the tracks presented in this site have a 'fade-in/fade-out' function built into their playing/pausing - this has been done for a smoother user experience, as audio files, when stopped, can have a momentary audial distortion, or 'clip' (caused by the waveform stopping at a non-zero crossing point).
This has been done through the jQuery animate function, which essentially changes the volume from full to zero (and visa-versa) over a period of time. However, when this is viewed in certain browsers (such as Google Chrome, at the time of writing) this fade can be accompanied by a small amount of audio distortion.
A demo of this has been made here: http://codepen.io/jerivas/pen/NGvzWB
To avoid any such distortion please consider viewing this page, specifically any areas which involve playing audio, through Firefox until further notice.
Apologies for the inconvenience - if you are aware of any way this could be avoided then please get in touch!
Copyright © 2019 Richard Jackson. All rights reserved.