QUOTE(kerioboe @ Apr 6 2009, 10:12 PM)
I have just bought my daughter a new Yamaha trombone.
Her teacher said that she had to be very careful to get her positions exactly right during the first few months as otherwise the instrument would never play properly in tune. Is this really true or is he just trying to put pressure on my daughter to to pay more attention to where the slide is?
A somewhat related question is what effect does a child's arms growing have on their positioning the slide correctly? My daughter has had a very rapid growth spurt. Her arms have grown by about 15cm over the last couple of months (I can tell this from her clothes on which the sleeves are all suddenly much too short) and her playing has become very sloppy. She complains that all the positions seem to have moved but her teacher seems to think suddenly having longer arms shouldn't make any difference.
When I got my new trombone it did take me a while before I got used to it and knew where exactly the positions were. This may because I went from a tenor trombone with a small bore to a tenor/bass trombone with a large bore. I think there is some truth in what he has said - as is the case with any instrument you buy.
Of course this will have an effect, especially if the growth spurt is happening rapidly. Due to the rapid growth she won't have time to adjust the slide position changes as she would if the growth was slower. When playing the trombone you get a feel for the positions are from the feel in your arm ... I remember that if I fully stretched my arm when I was 9 then that was 6th position, however now if I fully stretch my arm I go past 7th position. So it takes time to get your head around this new 'feeling' where the arms are.
I hope that makes sense, not really sure it does.