How to Identify and Notate Borrowed Chords Using Symbols

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Understanding borrowed chords is essential for musicians and students studying music theory. These chords add color and emotional depth to compositions by borrowing from a different key or mode. Properly identifying and notating them helps in analyzing and communicating musical ideas effectively.

What Are Borrowed Chords?

Borrowed chords are chords taken from a key or mode different from the original key of the piece. They are often used to create surprise, tension, or a sense of color in the harmony. For example, a common borrowed chord is the flat VII (e.g., G in the key of C major), borrowed from the Mixolydian mode.

How to Identify Borrowed Chords

To identify borrowed chords, follow these steps:

  • Determine the key of the piece.
  • Listen for chords that seem out of place or have a different quality than expected.
  • Compare the chord to the diatonic chords within the key.
  • Identify chords that resemble those from a different mode or key.

For example, in C major, a bVI chord (Ab major) is borrowed from the parallel minor (C minor), adding a dramatic effect.

Notating Borrowed Chords with Symbols

Using symbols helps clearly communicate borrowed chords in sheet music or analysis. Common notation methods include:

  • b for flat: e.g., bVII
  • # for sharp: e.g., #IV
  • Using parentheses to specify the borrowed mode or key, e.g., (from parallel minor)
  • Slash notation to indicate chord alterations, e.g., G/Bb

For example, a borrowed bVII chord from the Mixolydian mode is notated as bVII. This indicates the chord is a lowered seventh degree borrowed from a different mode or key.

Practical Tips for Musicians and Students

When analyzing or composing music:

  • Listen carefully to identify unusual chords.
  • Practice recognizing borrowed chords in familiar songs.
  • Use symbols consistently to communicate your analysis clearly.
  • Experiment with borrowing chords to add variety to your compositions.

Understanding and notating borrowed chords enriches your musical vocabulary and enhances your ability to analyze complex harmonic progressions.