Final answer:
The performing force in 'Columba aspexit' consists of a soprano solo voice and a drone. The drone provides a harmonic foundation, while the soprano carries the main melody.
Step-by-step explanation:
The performing forces in the Medieval Latin antiphon, 'Columba aspexit', consist of a soprano solo voice and a drone. This means that the musical work relies on a distinctive soprano voice for melody, along with a continuous note or chord to support the melody. The drone's tone does not vary throughout the song, which provides a harmonic foundation. The soprano voice, with its high pitch, carries the main melody and gives 'Columba aspexit' its unique sound.
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