An extensive music composition and analysis tool. An indispensable resource for any musician or music teacher interested in dodecaphonic and set theory analysis.

• Enter a tone row by touching the staff or playing the piano keyboard (on iPad).
• It lets you know if any notes are repeated by highlighting both notes, checking enharmonic values regardless of octave or accidentals.
• Automatically creates the Prime, Inversion, Retrograde, and Retrograde Inversion Magic Square.
• Constantly updates the Interval Vectors and Circular Analysis of the tone row as you edit it.

• Save your rows (rows may contain from 1 to 12 notes), complete with name and current P, R, I, RI matrix markings. Saved rows appear in a list with their name and midi numbers to help you identify them.
• Share a pdf of the notation, piano keyboard (iPad only), and circular analysis.
• Watch and listen to your row played with a selected rhythm pattern.
• Playback:
- Prime
- Prime then Retrograde
- Retrograde then Prime
- Retrograde
- Inversion
- Inversion then Retrograde Inversion
- Retrograde Inversion then Inversion
- Retrograde Inversion
• Each can be repeated and transposed with each iteration.
• The Root is kept within an octave above and below the original pitch when looping and transposing.

• Matrix Audio: Hear the pitches as you mark them in the matrix square. The marks indicate the row form in which the pitch belonged; Prime, Inversion, Retrograde, and Retrograde Inversion.

• Lock the prime row and transpose it to C to use the Absolute Pitch Method for row labeling in the matrix.

Comes preloaded with the following rows:
Alban Berg's Lyric Suite
Babbitt's Composition for Four Instruments
Schoenberg's Variations for Orchestra Op.31
Schoenberg's Piano Piece Op.33a
Webern's Concerto Op.24
Webern's Piano Variations Op.27
Webern's String Quartet Op.28

What’s New

Version 5.1

Added Interval Vectors and Circular Diagram. Bug fixes and other essential updates.

Ratings and Reviews

4.8 out of 5
10 Ratings

10 Ratings

giles berlioz ,

Somewhat Limited

A reasonable app’ but somewhat limited and, though reasonable, is not entirely intuitive .

Patrick Q. Kelly ,

from the developer

you can change the timing of the notes by touching the note value in the control bar. - a popover appears with many options. - these are for playback. - not notation. rewriting the notes as different values seems a pointless feature for this app. so the playback IS changeable. just not the appearance on the staff. press the play button and hear the rhythmic pattern you chose. I hope you try it and update your "review"

turbogtr ,


What a bold and beautiful app for the musically daring. I can put my scales and melodic pattern books away now.
Please add a loop function and the ability to play the full range of the piano or tone row.
Very Cool.......Thanks!
The update made a great app even better! I'm a composer this app is not for amateurs but for musicians and composers looking to unlock ideas beyond traditional scales and chords. This is by far the best app on this subject on the app store. Another Cool update......Great!!


Patrick Kelly
93.8 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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