Scholarships for young instrumentalists in jazz, classical and commercial performance will be offered in the annual B. Douglas Sawtelle Scholarship competition sponsored by the Orange County Musicians' Assn. Local No. 7 of the American Federation of Musicians. The competition is open to high school seniors enrolling in an accredited college as music majors or minors, as well as to continuing college students. Applicants must be residents of Orange County. Deadline for application is April 1. Information: (714) 546-8166.