just thought i'd post about this for people to read. i read too much here about mouth position and never about tongue so here it goes. this can improve your playing by leaps and bounds.
think about how when you are at rest your tongue is along the roof of your mouth. relax and let your tongue hug the roof of your mouth.
now draw the sides of you tongue ouward so your tongue comes in contact with all of your upper teeth accept the front.
create a seal between you tongue and your upper teeth so your mouth is cut in half by your tongue.
now hold your hand in front of you mouth and blow a little onto your hand to get the feel of it.
now play like that and never play not like that.
think about how when you are at rest your tongue is along the roof of your mouth. relax and let your tongue hug the roof of your mouth.
now draw the sides of you tongue ouward so your tongue comes in contact with all of your upper teeth accept the front.
create a seal between you tongue and your upper teeth so your mouth is cut in half by your tongue.
now hold your hand in front of you mouth and blow a little onto your hand to get the feel of it.
now play like that and never play not like that.