Hi, I am a keyboardist and am currently in the process of getting a Mac laptop to use live on stage. I will be using Logic 9 with Komplete 10 as my main source for sounds with Mainstage 3. Does anyone know if the quality of sound will be effected depending on what type of sound card is used in the computer? My thought was either to use an interface hooked up to the computer going straight into the mixer, or skipping the interface all together and going straight from the headphone jack of the computer to the mixer. If anyone has an opinion on this matter I would appreciate your input. Thanks, 88keez