Hi Steve,
sorry - I used "horn" in a generic sense meaning any/all the instruments in the band.
I have been very frustrated in trying to find a realistic sounding brass font. They all seem just wrong somehow but I can't put my finger on exactly what it is...
As for creating a soundfont... To be honest, I don't know exactly what would be required...
I guess several samples from each instrument - perhaps each partial from the bottom C with all valves up/trom in 1st position - C, G, C, E, G, C - and maybe even further up if you have someone who can push a trumpet and a trombone up into the stratosphere
It would be good to have a real Fluegel Horn and Cornet to call on as well as a large bore Euphonium, Tenor Horn of course and a Baritone and especially a REAL trombone sound.
You would need to capture the attack correctly and have enough of the held note to enable a loop to be created for sustained notes.
The next step would probably be to ensure it was exactly in tune...
Then into Vienna with all the samples...
I really am guessing as I've never done this.
I think it would be a lot of work so don't enter into it lightly, or expect a quick result.
Lawrie