Circle of 5ths Virtuoso III HD for iOS

By Eun Jae Lee $2.99

Developer's Description

Circle of 5ths is essential for all kinds of music. It is absolutely important for musicians to have a basic understanding of how the perfect 5th and intervals work in music.

This edition deals with twelve sharps and flats.

The number 12 is a special number in music, possibly the perfect number. In enharmonic keys, twelve numbers make the circle in the abstract that generates an interesting number sequence of 12, 10, 8, 6, 4, 2, 0, -2, -4, -6, -8, -10, -12 in symmetrical shape.

This is useful for understanding the circle of fifths and other related issues. Thus, fully comprehending these enharmonic key signatures is important.

The series of Circle of 5ths has been improved over the last two years and now the 3rd edition is out. Thanks to all users around the world for your support.

Whats new on the 3rd Edition of the Circle of 5ths HD?

This 3rd edition includes all features from 1st and 2nd editions PLUS;

New additions:

- Solfge: both fixed Do & movable Do useful for sight singing

- Inversions of the triads: 1st & 2nd inversions

- Color choice for the circle: six different colors to choose from

- Key regions: understand the relationship of the keys, useful for a key change & chord progressions

- Hide/Unhide Notes in the triad and interval parts

- Key Signature Quiz


- Graphics & design

- Performance & stability

- Scales & Triads

- Contents navigation

- Landscape mode

- Enharmonic Key Signatures

Features (Table of Contents)

1. Circle of 5ths in Flat, Major, minor, blank, minor and sharp

2. Circle of all 2nds, 3rds, 4ths, 6ths, 7ths, also changeable color of the circle.

3. Key signatures & regions Treble, alto and bass clefs.

4. Key matrices order of sharps & flats and reverse

5. Intervals - up to perfect 15th with harmonic and melodic sound

6. Drag & Drop practice key signatures and chord progression

7. Triads complete triads in root, 1st and 2nd inversions with sound

8. Scales major, natural minor, harmonic minor and melodic minor

9. Solfge in both fixed and movable Do. Sound in slow and fast tempo

10. Formulas Scale, chord and mode with sound

11. The overtone series with sound

12. Key Signature Quiz

13. Twelve Astrological/Zodiac signs (new update)

Full Specifications

What's new in version 12.1


Release June 20, 2020
Date Added June 20, 2020
Version 12.1

Operating Systems

Operating Systems iOS
Additional Requirements Requires iOS 8.0 or later. Compatible with iPad.


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