UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

Example URL:

Steps to reproduce the problem:
1. I'm experimenting with extensions such as HTML5 Video Speed Controller on Youtube and other websites in Chrome to view lectures/films faster; why does HTML5 audio cut out at anything faster than 0.5 and 4.0 and is there the possibility of changing this to allow audio to be sustained higher than x4 speed, or would Chrome have to change their code to allow that? Any knowledge/help appreciated.

What is the expected behavior?

What went wrong?
I'm experimenting with extensions such as HTML5 Video Speed Controller on Youtube and other websites in Chrome to view lectures/films faster; why does HTML5 audio cut out at anything faster than 0.5 and 4.0 and is there the possibility of changing this to allow audio to be sustained higher than x4 speed, or would Chrome have to change their code to allow that? Any knowledge/help appreciated.

Did this work before? N/A 

Is it a problem with Flash or HTML5? HTML5

Does this work in other browsers? N/A

Chrome version: 61.0.3163.100  Channel: n/a
OS Version: OS X 10.13.0
Flash Version: Shockwave Flash 27.0 r0

Contents of chrome://gpu: 
I'm experimenting with extensions such as HTML5 Video Speed Controller on Youtube and other websites in Chrome to view lectures/films faster; why does HTML5 audio cut out at anything faster than 0.5 and 4.0 and is there the possibility of changing this to allow audio to be sustained higher than x4 speed, or would Chrome have to change their code to allow that? Any knowledge/help appreciated.