Unit 2, Lesson 3 of 4
Brainlag Plus

Transposing by an interval

Music theory, Pitch and transposition, 14 minutes

Moving a note or a whole melody up or down by a given interval, with the new key signature and every accidental right.

Two steps for every note

To transpose is to move music up or down, keeping its shape. Every note moves by the same interval. For each note there are two steps:

  1. Count the letter names. Up a 3rd from D is F (D, E, F: count both ends).
  2. Fix the accidental so the distance in semitones is right. A major 3rd is 4 semitones: D up to F is only 3, so it must be F sharp.
D up a major 3rd: three letter names (D, E, F) and four semitones, so F sharp

Tip: getting the letter right first stops enharmonic slips. G flat and F sharp sound the same, but only one of them is the right number of letters away.

The rest of this lesson and its 5 practice questions are in Plus.

Screen 1 of 5, free to read.

  • 5 exam-style questions, marked as you go, each with a worked solution
  • Anything you get wrong is saved to your flashcards