<https://line6.com/support/topic/16128-alesis-alpha-112-fizz/#comment-118770>
<http://schema.org/text>
"If you have a steady buzz, even without playing guitar - check if it goes away when the USB Cable is removed from the Helix. \n  \nits common for DC Switching power brick supplies used for laptops/ Computer to inject noise via a USB connection into the audio stream  \n"
<https://line6.com/support/topic/16128-alesis-alpha-112-fizz/>