The thing is, Kurzweil’s have a breath controller input (or at least my K2500 does, not 100% sure about PC3’s). You can do some pretty realistic stuff with one of those.

But I truly believe that 99% of it is still down to the player. You either think like a horn player or you don’t. Most keyboard players go ‘close enough!’ and leave it at that but discount how familiar with great horn players even the average listener is. Close enough isn’t close enough! You either nail it or don’t bother. So many other sounds are easier to play. The wrong vibrato, the wrong bend, it doesn’t matter how good the basic samples are…

For me, one of the strengths of the original Kurzweil orchestral expansion programming was the multis… There are a ton of presets that put close to the whole orchestra on the keyboard, and with clever use of foot switches, buttons, expression and sustain pedals and velocity you could on the fly orchestrate and move between combinations of sections. High strings and oboes move effortlessly to cellos and brass, then a nice tutti with a piatti cymbal clash. Or whatever you felt like. And seamless multi changes as you moved from one combi to another.

Not many computer orchestral libraries offer this ease of use playing live (understandably) and comping together a quick rough orchestration….