Recorded a midi Track into Logic Prox. Midi info is there, but sound isn't. I know that MIDI info is just that, info, no audio… I'm using an M-Audio M-Hammer 88, connecting that via USB to my Mac. Sounds I'm using are from MainStage. I heard everything I played as I recorded it. All the info is there, it's in the piano roll and the score, but playback…nada! I'm pretty sure I'm missing a step…hence my screen name "NewGuy". Thank you.