The recitatives melodies are quite simple often imitating or exaggerating the vocal parts. The first original recitatives would be accompanied by harpsichord or basso continuo yet in Italian opera seria (serious opera), the composer kept the other instruments steadily involved in the character of the recitative voices. This practice seems to continue into the 19th century Romantic Period
It would soon be difficult to determine between the recitatives and the arias of the time. By the time Mozart and Wagner completed their latter works, the recitative differences would be unnoticeable. The audience felt that a fast paced recitative with equally stepped action on stage added to the enjoyment and entertainment quality of the performance, especially favorites like Mozart's 'Marriage of Figaro' and Rossini's 'Barber of Seville.'