emmabruj7

I have suggest you to one website techters which have all the information about the pc and my personal experience is on many digital musical instruments you find two USB connectors - one Type A connector labeled To Device and one Type B labeled To Host . The To Host is usually used to send MIDI, Audio or both Audio and MIDI to a computer, smartphone or tablet.

So whenever I have an application open on my MBP that uses MIDI (like Logic, Finale, DP, etc) and I have a USB MIDI keyboard plugged in and on, I get an audible hiss/buzz from my headphones or monitors. It's like the noise floor shoots up radically. It doesn't matter if the keyboards a USB-powered or not (plugged into the same outlet as my MBP or not) or whether the MBP is plugged in or not. If I turn off the board then it goes away. The weirdest part is that as I am typing this right now, when my fingers contact the MBP, the noise improves right away and when I take the keyboard off my lap, it gets better too. Anyone lese have this or ideas how to fix it? Is an external DAC a solution?