To envision yourself conducting an orchestra parallels your desire to be in control of everything that is associated with you. You want to keep a tight rein on things that are fluttering away from you or fluctuating too much in your life. Thus, seeing yourself conducting an orchestra is symbolic of your power and ability to manipulate things according to the way you see fit. Conducting an orchestra in your dream can also be interpreted as contemplation of putting certain plans to use.
Dreampt that I was the conductor of an orchestra for the first time but could not remember what to do. There was never any music and then the dream ended.