Synchronous Ring Modulation for Harmonically Coherent Timbres
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Solution Overview
Problem
Current methods for generating oscillatory timbres in musical synthesis, such as hard synchronization and ring modulation, are limited in producing musically pleasing and unique sounds due to simplicity and the lack of harmonic relationships in ring modulation results.
Innovation Solution
Combining hard synchronization with synchronized ring modulation, where a fundamental oscillator and a modulation oscillator are used to produce a synchronized output that is then ring modulated, eliminating the lack of harmonic relationships and creating a wide palette of musically useful oscillatory timbres.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ring modulation is used to generate oscillatory timbres, then additional frequencies are added to the spectrum, but the frequencies are not harmonically related to the original notes making them not musically pleasing
Solution Approach 1:
The patent combines hard synchronization and ring modulation into a unified system where the modulation oscillator is reset by the fundamental oscillator, merging the timbral variety of ring modulation with the harmonic coherence of synchronized oscillation
Solution Approach 2:
The system dynamically adjusts the phase relationship between oscillators through the hard sync reset mechanism, allowing the modulation oscillator to be periodically realigned with the fundamental oscillator to maintain harmonic relationships while preserving timbral complexity
2Adaptability or versatility
If hard synchronization is used with two oscillators, then a waveform with varying harmonics is produced, but the method is limited by its simplicity and familiarity
Solution Approach 1:
The patent merges hard synchronization with ring modulation by using the modulation oscillator output from the synchronized system as one input to the ring modulator, combining two established techniques into a more versatile system
Solution Approach 2:
The combined system serves multiple functions: it produces the synchronized waveform with varying harmonics from hard sync, simultaneously generates frequency components through ring modulation, and allows independent control of both processes to create diverse timbres
3Quantity of substance
If traditional ring modulation multiplies carrier and modulator signals, then frequency components are added, but the results are often associated with science fiction sounds rather than music
Solution Approach 1:
The hard sync reset mechanism dynamically controls the phase relationship between oscillators, creating time-varying modulation that produces musically pleasing amplitude envelopes while maintaining the frequency multiplication effect of ring modulation
Solution Approach 2:
The system uses feedback through the hard sync reset where the fundamental oscillator periodically resets the modulation oscillator, creating a closed-loop system that maintains harmonic relationships between the frequency components generated by ring modulation
Data Source
AI summary
Methods and systems for generating oscillatory timbres for musical synthesis through synchronous ring modulation are described. An example method performing hard synchronization comprising using first and second oscillators, the first oscillator being a fundamental oscillator which provides a fundamental frequency, the second oscillator being a modulation oscillator operable at a frequencies higher than the first oscillator; and in response to the fundamental oscillator completing its cycle, synchronizing the modulation oscillator to the original point of its waveform. Ring modulation may be performed on the synchronized output by multiplying it by a waveform of the fundamental oscillator, such that the ring modulation is synchronized to produce a variety of oscillatory timbres. The method can create a variety of unique sounds having musically pleasing characteristics. A real-time audio signal can be used instead of the first oscillator to produce dynamically varying timbres.