Count Note Letters from Start to End

Supplied materials

• Paper and a pencil, or typed notes. Write note letters and number the positions you count.
• Example: Using the ordered letter list C,D,E,F,G,A,B,C, count inclusively from C to D upward without wrapping beyond this list. What is the generic interval number? Choices: (A) 1 (B) 2 (C) 3 (D) 4.
• Try this: Using the ordered letter list C,D,E,F,G,A,B,C, count inclusively from D to F upward without wrapping beyond this list. What is the generic interval number? Choices: (A) 2 (B) 3 (C) 4 (D) 5.

Learn the idea

A generic interval number counts written note-letter positions. Include both the starting letter and the ending letter. This number alone does not tell the interval’s quality, such as major or minor; that also needs pitch-distance information.

Look at the example. Count both endpoints and intervening letter positions: C starts as 1, followed by 1 more position. The generic interval is 2. Quality such as major or minor would require pitch distances, not just letters.

Count letters, not just the gaps between them. Count the first letter as 1 and keep both endpoints in your count.

1. Read the ordered note-letter list. Find C and D, and count both letters from C upward to D.
2. Compare counting two letters with counting one gap. Explain why the generic interval number is 2.
3. Try the check question and the three practice questions. Then read the feedback.
4. Write C,D,E,F,G and show the inclusive count from C to G.
5. Check your work. The count includes both C and G and labels the result a generic fifth without inventing interval quality.

Check your reasoning

Your answer is temporary and is not saved to an account. Download your current answer before leaving or reloading. Written work on paper or in another app stays in your own file.

Take it further

Try a new example: Using the ordered letter list C,D,E,F,G,A,B,C, count inclusively from E to G upward without wrapping beyond this list. What is the generic interval number? Choices: (A) 2 (B) 3 (C) 4 (D) 5. Answer: 3. Count both endpoints and intervening letter positions: E starts as 1, followed by 2 further positions. The generic interval is 3. Quality such as major or minor would require pitch distances, not just letters. Make your own: Write C,D,E,F,G and show the inclusive count from C to G. Check your work: The count includes both C and G and labels the result a generic fifth without inventing interval quality.

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.