Hi to all you guys. This is my first post here. Since I bought one pocket MP3 player, it came to my mind how to use it to improve my intonation: - I wrote in Finale scales, exercises, and everything that i'm learning, and convert them in MP3 files, in many various tempos. - When I'm playing a DB i play it with an headphones or sometime with a speaker and play unison with a "music" that I'm listening. I even have an option to set one interval of music to repeat over and over, so I can isolate harder places. After a little while I turn down the volume more and more, and gradually speed up tempo a bit. After some time my intonation is really good, but I also feel that i am not so sure when it comes to practicing without my pre-"recorded" music. Since I am so new to instrument, I am not sure are there any "side effects" or bad things about this way of practicing. I just wonder what do you think about it? I play DB about two years, german bow, Streicher method, and a teacher (i go to school). Offcourse, I play mostly classical music.