 For example, flute and clarinet imitate the singing of the birds, trombones and contrabassoon articulate the roaring of the lion.When God speaks in person, "Seid fruchtbar" (be fruitful), the bass voice is accompanied by the low strings only.The solemn sound is reminiscent of the string quartet accompanying the Vox Christi (voice of Christ) in Bach's "St Matthew Passion".