I'm having trouble figuring out a ground hum issue that only appears in a specific setup arrangement.
This arrangement is in violation:
Pedalboard powered by One Spot CS12 PSU, Pedalboard, Beatstep Pro, Subharmonicon, Laptop, BSP Y-connector, Soundcard
The peculiar problem is that I only experience the hum when I connect to ALL of the pedals in my chain, and it sounds just like the Beatstep pro's hum when not using the Y connector.
The hum disappears if I solely connect to my Eventide pedals.
When the Beatstep is disconnected from the computer but is connected to all the pedals, there is no hum.
Do you have any idea what's going on?