The scale of this piece is:

Question

BlackTom AI · Accepted Answer

The scale is major because the tonic triad and the third degree produce a major third above the tonic (four semitones), which defines a major scale/quality.

Relevant knowledge points:
- A major scale is characterized by a raised (major) third above the tonic; a major triad consists of a root, a major third (4 semitones), and a perfect fifth (7 semitones above the root).
- A minor scale/triad has a minor third (3 semitones) above the tonic.
- “Pianissimo” and “forte” refer to dynamics (very soft and loud) and do not describe scale quality.

Step-by-step reasoning:
1. Identify the tonal center (tonic). Find the note that functions as the “home” pitch, where phrases resolve.
2. Determine the interval from the tonic to the third scale degree (the mediant). Count semitones between these two notes.
3. If the interval is 4 semitones, that is a major third, indicating a major scale/triad; if it is 3 semitones, it indicates a minor quality.

Intermediate calculations (interval counting examples):
- Example for C major: C to E = C→C#(1), C#→D(2), D→D#(3), D#→E(4) → 4 semitones = major third → major.
- Example for A minor vs A major: A to C = 3 semitones → minor third → A minor; A to C# = 4 semitones → major third → A major.

Why the correct answer is correct:
- If the excerpt’s tonic and accompanying harmony produce a root + major third + perfect fifth sonority, the scale must be major. The presence of the major third in either the melody or the chord progression is conclusive evidence of major mode.

Why other options are incorrect:
- Minor: would require a minor third (3 semitones) above the tonic; if the piece shows a raised third (4 semitones), it cannot be minor.
- Pianissimo/forte: these describe volume, not scale quality, so they are not appropriate choices for identifying the scale.

Conclusion: Based on the identification of the tonic and the presence of a major third (4 semitones) producing a major triad, the correct scale is major, which matches the provided answer: major.

The scale of this piece is:单项选择题

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