Dynamic Tonality has updated XronoMorph – a free app for OS X and Windows, that lets you make beats while exploring a new theory of rhythm.
XronoMorph is designed for beat making, using two mathematical principles: perfect balance and well-formedness:
- Perfect balance is a generalization of the polyrhythms found in many African and jazz musical traditions. A rhythm is perfectly balanced when the mean position (center of gravity) of all its rhythmic events, when arranged on a circle, is the center of that circle.
- Well-formedness is a generalization of the additive rhythms found in aksak (Balkan), sub-Saharan African, and progressive rock musical traditions. Well-formed rhythms contain no more than two interonset intervals, arranged as evenly as possible. WF rhythm are typically nested by faster WF rhythms, which in combination form complex interlocking rhythmic hierarchies.
These principles are outlined in the papers Perfect balance: A novel principle for the construction of musical scales and meters & Computational Creation and Morphing of Multi-Level Rhythms by Control of Evenness.
In XronoMorph, each rhythmic layer is visualized as a polygon inscribed in a circle, and each polygon can be constructed according to two different mathematical principles: perfect balance and well-formedness (aka MOS).
Here’s what’s new in XronoMorph 1.5.0:
- Performance enhancements.
- Numerous user interface enhancements. For example, tempo can now be changed by speed (revolutions per minute) or duration (length of revolution/period); the long/short beat ratio can be displayed for every well-formed level; balanced polygons can be rotated in pulse units (in addition to degrees, radians, or turns).
- There is no longer any requirement for Java to be installed.
- Polygon channels can now pass through MIDI tracks unchanged (by selecting the “–” option in the MIDI track channel menu). This is useful when sending MIDI to multitimbral synths.
- 18 new perfectly balanced but irregular polygons—all possible primitive minimals found in 42 equal divisions of the period. These are great for creating complex polyrhythms mixing 3s, 4s, 6s, and 7s.
- In addition to the golden ratios, silver and bronze ratios are now available in well-formed mode. These “special” ratios produce deeply non-isochronous rhythms where the beat size ratios of successive levels periodically repeat.
- MIDI options available in the interface to allow MIDI ports to be disabled.
- MIDI learn (this feature is still in beta and not yet hooked up to the preset system—that will come).
In addition, these bugs were fixed:
- Audio, MIDI, and Scala file save now work correctly on all platforms.
- Startup time is much improved.
- Switching to PB mode sometimes results in incorrect tempo, now fixed.
Pricing and Availability
XronoMorph is available as a free download for Mac OS X & Windows.