YOU might have taken or are thinking of taking the Royal Schools of Music Practical Examination. What grade have you reached? Are you satisfied with your results? If you want to know a lot more about the exam so as to get higher marks, you must not miss a seminar titled ''How to prepare for the Royal Schools of Music Practical Examination''. Conducting the seminar is Dr Edward Ho, practical examination examiner of the Royal Schools of Music. Dr Ho, who is head of the music department of the Kingston Polytechnic in England, is here on the invitation of The Friends of the Philharmonic. The seminar will give you valuable tips on the kind of playing or singing that would impress the examiner; how to prepare for sight-singing and the new aural syllabus, and how to play scales well; what music editions to choose and how to plan one's repertoire. You will also learn how to prepare yourself psychologically for the exam. There will be a question time during the seminar. The event takes place on Saturday from 6 pm to 8 pm at the Lecture Hall, Hong Kong Space Museum, Tsim Sha Tsui. The fee is $30 (Friends of the Philharmonic) and $60 for others. If time permits, Dr Ho will also talk about music study in England. For tickets, call Mr Jimmy Shiu on 721-2320.