i haven't seen anything that specific.
all i have to go off of are multiple accounts of "it works" and this from the bsp manual:
Something to consider : Ground loops
A ground loop is an unwanted current in a conductor connecting two points. The result is
noise in your audio signal, usually in the form of a low-frequency hum. In setups
including computers, interfaces and audio devices, it’s possible to end up with an
annoying ground loop. We have provided you with a solution, however: the anti ground
When should I use the anti ground loop adapter?
In most cases you will not need the anti ground loop adapter.
If you don’t have a ground loop problem in your setup, simply connect the BeatStep
Pro with the supplied USB cable to a computer or a USB power supply.
You should use the included anti ground loop adapter if you experience background
noise in your speakers that disappears when you disconnect the audio interface from
your computer or the CV/Gate connections to your analog gear. A ground loop can also
cause problems with pitch tracking when using the BeatStep Pro CV connections with