I was fooling around with garageband when I noticed that some of my software instruments dont sound right. most of the synth sounds and techno type stuff sound fine though. also im not sure what it means when the loop color is blue or green but most of my hip hop sounds and any "green" loops dont sound right either. They basically consist of midi-sounding blips and beeps. If anyone knows how to fix this let me know. I appreciate any advice or suggestions

Thanks in advance