System and method for applying a role-and register-preserving harmonic transformation to musical pitches
US5936181A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1998 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | May 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2240/056
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
This invention relates to a system and method for altering the harmonic referent of segments of a music composition while maintaining the register of the musical segments and their conformity to a harmonic rule-base. By combining the three novel notions of a "role-preserving" transformation "shape-preserving" transformation, and a "register" preserving transformation, a novel operation enabled by the present invention can be described. Essentially, the invention allows a pitch to be moved from one harmonic context to another. The pitches are then constrained to take on values that have the same harmonic function as their corresponding original pitches, while remaining, as much as possible, within the same register as their corresponding original pitches. Secondly, when a group of pitches are moved together as a melody, the operation can preserve not only the function and register of the pitches but the shape of the melody. Many instruments in the orchestra have a timbre that varies quite dramatically from the bottom to the top of their pitch range. A transformation which can preserve the register can be helpful, when applied to the parts of an orchestrated score, in keeping the tim…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.