If You Hear Hum When Plugging a Keyboard into Your

Multiple Choice

If you hear hum when plugging a keyboard into your mixer, how can you fix the problem?

A) Power your mixer and the instrument from separate circuit breakers.
B) Enable a compressor on the keyboard channel.
C) Power your mixer and the instrument from the same outlet strip.
D) Turn the keyboard way down in the mix.
E) All of the above.