Change One Pitch Within a Brief

Supplied materials

• Paper and a pencil, typed notes or a browser scratch area. Color names can replace colored supplies; drawn figures and timelines can replace performance.
• Complete teaching inputs: Original motif pitches [60, 62, 64], durations [1, 0.5, 0.5]. A variation must retain all durations, change exactly one pitch, and use only[60, 62, 64, 65]. Which candidate satisfies all three? Supplied candidates: (A) pitches [60, 62, 64], durations [1, 0.5, 0.5] (B) pitches [60, 62, 65], durations [1, 0.5, 0.5] (C) pitches [60, 62, 65], durations [1, 1, 1] (D) pitches [61, 63, 65], durations [1, 0.5, 0.5].
• Independent check: Original motif pitches [61, 63, 65], durations [1, 0.5, 0.5]. A variation must retain all durations, change exactly one pitch, and use only[61, 63, 65, 66]. Which candidate satisfies all three? Supplied candidates: (A) pitches [61, 63, 65], durations [1, 0.5, 0.5] (B) pitches [61, 63, 66], durations [1, 0.5, 0.5] (C) pitches [61, 63, 66], durations [1, 1, 1] (D) pitches [62, 64, 66], durations [1, 0.5, 0.5].

Learn the idea

Explain why a candidate satisfies its actual constraints. Analyze a supplied chord third, retain rhythm while changing one motif pitch, separate access to a shared crossing and turn a rehearsal note into a targeted revision. A motif variation can retain its duration pattern while changing a specified number of pitches. Check note-by-note changes, allowed pitch membership and every duration rather than relying on overall similarity.

Reason through the supplied case: The candidate changes only the final pitch from 64 to 65, which belongs to the allowed set, and leaves durations unchanged. The original changes none, an all-note shift changes three, and the all-one-duration candidate alters rhythm.

A transposition of all pitches is a different operation from changing exactly one. This task checks written constraints and does not judge expressive performance or verify played accuracy.

1. Read the complete teaching inputs and mark the feature, rule or constraint being tested.
2. Compare the model decision with one rejected candidate; state the visible evidence or calculation that distinguishes them.
3. Solve the independent check and the three changed-input practice cases before reading feedback.
4. Create a three-note motif with durations one, half and half, then change only the middle pitch within a declared allowed set.
5. Check your artifact against these explicit criteria: Exactly one written pitch changes, every duration stays fixed and all pitches belong to the stated allowed set.

Check your reasoning

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Take it further

New-input analysis: Original motif pitches [67, 69, 71], durations [1, 0.5, 0.5]. A variation must retain all durations, change exactly one pitch, and use only[67, 69, 71, 72]. Which candidate satisfies all three? Supplied candidates: (A) pitches [67, 69, 71], durations [1, 0.5, 0.5] (B) pitches [67, 69, 72], durations [1, 0.5, 0.5] (C) pitches [67, 69, 72], durations [1, 1, 1] (D) pitches [68, 70, 72], durations [1, 0.5, 0.5]. Expected relationship: pitches [67, 69, 72], durations [1, 0.5, 0.5]. The candidate changes only the final pitch from 71 to 72, which belongs to the allowed set, and leaves durations unchanged. The original changes none, an all-note shift changes three, and the all-one-duration candidate alters rhythm. Create your own artifact: Create a three-note motif with durations one, half and half, then change only the middle pitch within a declared allowed set. Completion criteria: Exactly one written pitch changes, every duration stays fixed and all pitches belong to the stated allowed set.

Nothing here is saved to an account or sent to a teacher. The answer download includes your current choice and any checked feedback. It does not include choices from the separate More practice section. Download that section separately.