Introduction The method of musical analysis – “drive analysis” – is explained on this video, as well as at the bottom of this page, and complements Kenneth Smith’s book, Desire in Chromatic Harmony (OUP, 2020). As an advanced feature, the program further allows users to track “entropy” across the course of a piece as described in the article, “The Enigma of Entropy in Extended Tonality” (Music Theory Spectrum 43, no. 1, 2021). Installation Download the latest version and open the zip file. The programme requires no installation. However, because I have no security certificate, your operating system is likely to try and prevent the file opening. This will require you to insist; be firm with your OS – don’t let it win. Load XML
Settings
The settings dialog contains the following options: click “apply” to operate the profile and re-load the analysis: Include triads Include anacrusis Arpeggio searching
Remove repeated patterns Include non-drive events Merge Similar Events together (slider, 5 positions) Show Grid Show resolution patterns Colour-code chords Show entropy Save as pdf Save / Load Keyboard
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What is drive analysis? Pick any five or six pitches on the keyboard (above)—something dense, maybe even strange, ideally a sound you’ve never stumbled across before. Beneath your chord, you’ll see several labels appear. These aren’t meant as the “true” name of the chord, but as glimpses into the tug-of-war between different tonal centers—those subtle inner harmonies that often jostle for attention in music beyond the Common Practice era. Each of these hidden “chords within the chord” is genuinely there, woven into the larger sonority, even if we wouldn’t usually use them as the main label. Think of them as signposts pointing to the chord’s delicious ambiguity. [Watch my video about it here] Have a look at the famous “Mystic” chord below, used by Scriabin, Szymanowski, and even found in jazz. This chord has been interpreted in many ways: as nearly octatonic, nearly whole-tone, a synthetic chord derived from the acoustic overtone series, or a jazzy V13(#7). The theory in drive analysis doesn’t contradict any of these views, but instead explores the various tonal pulls—what I call “drives” (a term borrowed from Freudian theory, in which humans are influenced by multiple partial drives pulling in different directions at once). First, play the chord—either in real life or using the keyboard above—then resolve it as described in the three examples to the right. Each resolution will sound a bit surprising at first, but once your ear adjusts, each will feel natural, even inevitable. These three “drives” are therefore in conflict, each vying for resolution. In some ways, this might even model the way human listening works. What does it look like? If you do it the way I do, you’ll end up with a large grid: the cycle of fifths runs down the y-axis, and “time” (in a flexible sense) runs along the x-axis. The “drives” present are marked with symbols. In Desire in Chromatic Harmony I used one particular set of symbols, but the Harmonic Drive Analyzer program uses a simpler code. Circles represent 4-note chords (the darker the circle, the stronger the drive), while triangles represent triads (optional here, since in this style of harmony they tend to carry less tension). Bass notes are shown with dots. A grid might look something like this:
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Version History | |
Version 1.2 (1st Septmebr 2025) |
Added Features
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Version 1.1 (26th August 2025) |
Added Features
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Version 1.0 (8th August 2025) |
Features
Known Problems
Planned Developments
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© Kenneth Forkert-Smith, University of Liverpool