Clearly, there is ample diversion to be had before sampling even a semiquaver of Steffani.
The CD offers a generous 25 tastings and, when the 2010 Covent Garden production of Steffani's Niobe, Queen of Thebes received lukewarm critical praise, perhaps an anthology is the best approach.
Bartoli is an operatic tigress and relishes the primary emotions of rage, fear, lust and anguish, launching the disc with a flaring battle cry, against the trumpeting splendour of I Barocchisti under Diego Fasolis.
Within a track, soothing lutes introduce contemplation, with strings and woodwind entwining around the mezzo's expressive bel canto. The disc offers thrilling opportunities for operatic anger, a genre in which Bartoli excels.
She is particularly terrifying in a punchy aria from The Battle between Hercules and Acheloo, singing of flying vipers and horrible monsters, against what sounds like a major volcanic eruption from I Barocchisti's percussion section.
Not all is thunder and fury, however; fans of Philippe Jaroussky will enjoy the French countertenor in four duets that offer some gentler joys.
Verdict: Celebrated mezzo and operatic sleuth Cecilia Bartoli thrills with her latest discovery.
Stars: 5/5