if ur gonna record vocals into sonar or whatever program and take the vocals into another studio for mixdown, make sure the studio ur taking it to has the same software u do.....or else u gotta take em a bunch of wave files and when u get to the studio u gotta open each wave file one by one and u gotta arange the vocals all over again and thats extra time spent....best thing to do, especially if u got sonar, record ur vocals, arange em and shit the way u want, export em to a OMF file and take em to any studio that gots Pro Tools and the shits already arranged ready to mix.. but yea make sure u got a descent pre amp