Jump Links below for each scenario and how to solve:
Ground Loop: https://youtu.be/aVS8vgNtsS4?t=55
Audio Connection: https://youtu.be/aVS8vgNtsS4?t=280
Pickup Hum: https://youtu.be/aVS8vgNtsS4?t=459
Morley's Audio Solution Devices will prevent 90% of the Hum & Buzz issues you'll run into at the gig or studio. Below are helpful links to our audio products and an article elaborating more on this video:
https://www.morleyproducts.com/tag/audio-solutions/
https://www.morleyproducts.com/hum-removal-tool-box/
https://www.morleyproducts.com/how-to-get-rid-of-hum/