Posted by jeff miller on December 12, 2003 at 05:40:31:
In Reply to: Re: Re: Re: Smaller mouthpiece for bigger horn posted by Rick Denney on December 11, 2003 at 18:28:11:
Another factor to consider here is that the volume of air in the moutpiece begins to make the air column act as though it's longer than it actually is. If I remember correctly, this effect becomes more pronounced (i.e. the virtual tube gets longer) the higher you play on the instrument. I've always felt that this was why a large cupped mp can work well in the mid to low registers, but make the horn flat at the top.
Maybe this is what you are alluding to by impedance curve.
Then again, I'm no expert. :)#
Jeff