<p>As others have said, the only way to know is to try. BUTI YAO does not take all that many horns (they tend toward large sections so it may be one or two more than a typical orchestra,) so the competition is going to be tough. I believe BUTI has a separate wind ensemble that takes more horns than the orchestra and they also have a 2-week French Horn workshop that takes place before YAO which takes a fair number, so look into those as well.</p>
<p>One tough thing about BUTI is that you do not find out until early April whether or not you have been accepted. That is past the application deadline for most summer programs and the better ones tend to fill quickly, so you may want to apply to another program as a backup. (Hopefully one without a large application fee.)</p>