gen-define-key-signatures-and-give-one-short-worked-example-557d

Define key signatures and give one short worked example.

# Key Signatures ## Definition A **key signature** is a set of sharp (♯) or flat (♭) symbols placed at the beginning of a musical staff that indicates which notes should be consistently raised or lowered throughout a piece. It tells you what key the music is in. **Key points:** - Appears immediately after the clef, before the time signature - Applies to all octaves of the specified notes - Determines the scale and tonal center of the piece - Can indicate either a major key or its relative minor --- ## Worked Example **Question:** What key has 2 sharps in its key signature, and what notes are sharp? **Solution:** 1. **Identify the sharps:** The order of sharps is F♯, C♯, G♯, D♯, A♯, E♯, B♯ - With 2 sharps: **F♯ and C♯** 2. **Determine the major key:** - Rule: Go up a half-step from the last sharp - Last sharp is C♯ → up a half-step = **D major** 3. **Find the relative minor:** - Go down 3 half-steps (minor third) from D - D → C♯ → C → **B minor** **Answer:** The key signature with 2 sharps is **D major** (or **B minor**), with **F♯ and C♯** sharped.