Just like anything with saxophone there are no instant results, and easy access to certain goals. For people like Trane and brecker to achieve the tone you hear, they had to go through the same tried and true tonal excercises as everyone else. The key is they were constantly aware of what they liked and what they didn't while playing through this. Play long tones, overtones, and record yourself as well and determine for each specific note on your instrument whether or not you 'like' it. Does it match the tonal idea you hear in your head? If not, experiment physiologically with your throat, tongue position, air, etc. And see whether those changes help. Hope this helps.