The upcoming New York Philharmonic auditions, and the questions about preparation for them is an interesting topic.
To play well at those auditions a player must know the music intimately.
When I played my first professional audition the music was not easy to come by. There were only FIVE International excerpt books, two Wagner books, and a Strauss book. If you were really lucky you had "Die Trompette" of Herman Pietzsch.
I copied by hand lots of the repertoire that was unavailable in books. This was before I played my first audition.
I was first trumpet in every community orchestra in Philly and the nearby Jersey cities. I knew the music by memory. I once played an audition for a conductor completely by memory, it was for a big gig. I did not get it, for it was in the early sixties.
The bottom line is that there are players who are prepared to play an audition at the drop of a hat. They know the tunes and can play them.
I met Ed Carroll, Wynton Marsalis and Manny Laureano when they were young players........they were killers.
Don't think about audioning if YOU aren't one
Wilmer