Typically, "scenes" comprise recitative, arioso, aria and ensemble elements, with occasional instrumental (sinfonia) passages. Commentators (including and ) have seen the initial recitative and arioso as "operatic". The solo cello follows with another recitative and cadenza. An aria is a formal musical composition unlike its counterpart, the recitative. The solos are typically a combination of recitative and aria. It consists of two arias surrounding a central recitative. The simplest kind of melody is the liturgical recitative. Poulenc set his libretto largely in recitative. Here, orchestral accompaniment provides an intense underlay of vivid tone-painting to the solo recitative. A soprano recitative, "" (Alas! A short "secco" recitative, beginning "" (My God! This is displayed by Hasse through extended recitative passages. Many of Wagner's operas employ sections which are analogous to accompanied recitative. Minor changes, transpositions, and alterations to recitative sections are not shown. The chant is usually an elaborate form of the well-known recitative of the preface.