He returned to the festival in 1978 with a recital and as the Italian singer in Der Rosenkavalier , in 1983 with Idomeneo , and both in 1985 and 1988 with solo recitals . Pavarotti returned to the festival in 1978 with a recital and as the Italian singer in Der Rosenkavalier , in 1983 with Idomeneo , and both in 1985 and 1988 with solo recitals .