The strongest finish to a song often involves a cadence that creates a sense of resolution and emotional impact. Common cadences that achieve this effect include:
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Perfect Authentic Cadence (V-I): This is the most conclusive cadence, resolving a dominant chord (V) to a tonic chord (I). It signals a clear end and creates a strong sense of closure.
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Plagal Cadence (IV-I): Often referred to as the "Amen Cadence," this resolution can evoke a feeling of satisfaction or calmness and is commonly used in hymns.
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Deceptive Cadence (V-vi): This creates surprise by leading the listener to expect a resolution to the tonic but instead resolving to the submediant (vi). This can create a dramatic finish if used strategically.
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Picardy Third: Ending in a major chord when one would expect a minor chord can create an uplifting finish, providing contrast and a sense of resolution.
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Extended Cadence: A series of repeated cadences or a slow unfolding of cadential phrases can build intensity and anticipation before finally resolving.
Ultimately, the strongest finish depends on the genre, emotion, and context of the song, but utilizing a perfect authentic cadence is a classic method for creating a powerful conclusion.