 Typical of Meyerbeer 's innovative orchestration is the use in Robert le diable of dark @-@ toned instruments – <unk> , timpani and low brass , including <unk> – to <unk> the <unk> nature of <unk> and his associates . At one point the arrival of a character is announced by a combination of three solo timpani and <unk> double @-@ <unk> . Similar <unk> is shown in Les Huguenots where the composer uses a solo bass <unk> and solo <unk> d <unk> to accompany <unk> . For Le prophète , Meyerbeer considered using the newly invented saxophone . Becker suggests that Meyerbeer in all his grand operas often ' created a deliberately ' <unk> ' sound <unk> with unusual orchestration designed to express ... content rather than produce a sensuous sound ' and opines that this explains much of the criticism he received from German writers on music . 
