I think the only reason I pick up bass, guitar, percussion, and other string and percussion instruments relatively quickly is because of the visual aspect of it... I can imagine a riff in my head, and imagine where the notes should go on the fretboard, go try it, and be pretty much right. But with a clarinet, or trumpet, etc... you can't really do that. You can't look down and see the note you want... The mallet percussion coach was mad at my band director when he moved me to bass guitar my first year in marching band, because I was picking up marimba really well... Once again, cause I could look down and see the notes, see the scales, etc... The 1st chair tuba tried to teach me to play... and except for belting out one note in the open position, it just wasn't clicking, and after a week she and I both gave up. So, how do you horn players do it?