Midi keyboard makes noise on key release in Garagaband
So I have a Casio LK-43 connected to a MacBook pro via the USB. When playing, every key release makes a bleep, error like noise in computer speakers or headphones. The noise is not recorded on the garageband track, but is impossible to play when every key release makes like an error bleep in ones ears.
Any suggestions to the cause or how to fix please?