# Advanced Intervals & Inversions, Music theory

Compound intervals, inversion, and the tritone

Building on basic interval knowledge, this module covers the concepts that unlock harmonic analysis: compound intervals, interval inversion, the consonance-dissonance spectrum, and the tritone, the most harmonically charged interval in Western music.

Intermediate · 4 lessons · approximately 55 minutes of material (not a mastery deadline).

## Before this module
- [The Circle of Fifths: Keys in Depth](/learn/theory/keys-depth), Relative keys, parallel keys, and modulation preview

## What this module covers
1. **Compound Intervals in Depth**, Beyond the octave, ninths, tenths, and beyond (13 min)
2. **Interval Inversion**, How inverting an interval changes its quality and function (13 min)
3. **The Tritone**, The most dissonant interval, its history, function, and resolution (14 min)
4. **Intervals in Orchestral Excerpts**, Identifying intervals in real string and orchestral passages (15 min)

## What comes next
- [Rhythm Mastery & Complex Meters](/learn/theory/complex-meters), Compound time, irregular meters, polyrhythm, and hemiola

## Where should I start with advanced intervals & inversions?
The curriculum places The Circle of Fifths: Keys in Depth before this module. Review those topics if they are unfamiliar. The first lesson is “Compound Intervals in Depth”: Beyond the octave, ninths, tenths, and beyond. The order is a study guide, not proof that every learner needs the same pace.

## How long is the advanced intervals & inversions module?
The 4 listed lessons total approximately 55 minutes of material. That estimate describes lesson content, not the practice time needed to become comfortable with compound intervals, inversion, and the tritone. Revisit one task at a time and use feedback from a teacher where physical technique is involved.

## What can I try here without an account?
The advanced intervals & inversions description, lesson sequence and prerequisite links are public. There is no full worked lesson sample for this module yet. The linked public tools and references are free. A free account includes the complete five-lesson foundation module in each instrument and five lessons in music theory, with saved progress and no expiry. Later lessons require the relevant paid package.

## Continue in Arco
The complete five-lesson foundation module in each instrument and five music theory lessons are free with an account, including saved progress and no time limit. Later lessons require the relevant paid package. Public samples do not assess your physical technique or certify exam readiness.

[See packages and pricing](/pricing) · [Back to the music theory curriculum](/learn/theory)

Canonical source: https://arcosounds.com/learn/theory/advanced-intervals