Mpc x audio input

I have an mpc x with a keyboard connected by midi. I have the audio of the keyboard going into the mpc x audio input. When I play a sequence I can hear both the drums and samples of the mpc, along with the audio of the keyboard through my headphones. However, the speakers in my laptop only play the drums of the mpc x. I cannot hear the keyboard audio.

On the main screen, push Audio Tab, then press Monitor Button on the audio track.