Which term describes two keys that share the same letter name?

Which term describes two keys that share the same letter name?

• A. Ostinato
• B. Piano
• C. Polytonality
• D. Parallel Major/Minor

Answer: (D)

Two keys that share the same letter name are described as parallel major and minor. In this case, the major and minor forms use the same tonic note, but their scales differ in quality. For example, C major and C minor both start on C, yet C major has a raised third (E) giving a brighter sound, while C minor has a lowered third (E♭) producing a darker mood. This is what the term parallel highlights—the same pitch center with different modes. It’s different from relative keys, which share the same key signature but have different tonics (like C major and A minor). It’s also distinct from polytonality, where two keys or tonal centers are used simultaneously and aren’t tied to the same letter name.

Two keys that share the same letter name are described as parallel major and minor. In this case, the major and minor forms use the same tonic note, but their scales differ in quality. For example, C major and C minor both start on C, yet C major has a raised third (E) giving a brighter sound, while C minor has a lowered third (E♭) producing a darker mood. This is what the term parallel highlights—the same pitch center with different modes. It’s different from relative keys, which share the same key signature but have different tonics (like C major and A minor). It’s also distinct from polytonality, where two keys or tonal centers are used simultaneously and aren’t tied to the same letter name.