Nonetheless, this extraordinarily large ensemble is used with great moderation by the composer. In particular, Penderecki exploits the use of chamber ensembles coupled by their correspondence of timbre quality and specific coloristic effect. With the resulting palette of orchestral colors at his command, Penderecki is able to provide a musical commentary and thus determine the expressive quality of a given scene. While the smaller ensembles predominate through the work, Penderecki resources to the full ensemble resonance for dramatic effect, emphasizing this way the most emotionally charged scenes, such as the exorcisms of the Ursuline nuns and the death of Grandier.