Newbie here. I understand that the higher the speed, the better the music quality. But less music recorded per length of tape. I understand that the wider the format (2 track vs 4 track) the better the quality. But less music recorded per length of tape. Best quality from 1/4inch tape therefore, is obtained with 15in/sec on 2 track. But to increase music time, which gives better quality: 2 track running at 7 1/2, or 4 track running at 15in/sec? I'm guessing the latter gives better quality, with all else being equal. Learning, Thanks!