Trombone sounds and also adding a trumpet

[GamemakerX1]

Can you please make it to where the trombone holds a note instead of just playing a note for a short time and also please add a trumpet noise along with a violoncello and a contrabass!!!

There was a user that used 8 bit square (Octave stack with a high cut.) and saw (low cut and high gain.) to make some sort of brass. I detuned the pop synth, cut the high and, added a big reverb to it so that it can sound like French horns. The brass sounds ok but unless you detune it, the sound will have a very sharp attack (phew instead of braaah or whooaa.) we have plenty of strings, and Sus Strings is fixed so, we can actually use it now. We would like a low-end end brass as well as sax and synth brass. (Which would be cool.) Sustain synths are desperately need but I am patient. The double brass patch is my Favorite. trombone and saw, square "Octave stack." or (pop synth octave stack) Thank you for reading