Audio Tempo Processing With Percussion Timbre Preservation
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Solution Overview
Problem
Existing master tempo processing technologies fail to prevent a change in timbre for percussion instrument sounds during tempo changes, as the length of the waveform is altered, making the timbre change recognizable.
Innovation Solution
An audio data processing device that separates audio data into acoustically distinct parts, applies master tempo processing to one part, and relocates the sounds of the other part based on their sounding positions and velocities to maintain the same timbre during tempo changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If master tempo processing is applied to change the tempo of a music piece, then the playback speed can be adjusted, but the timbre of percussion instrument sounds becomes easily recognizable as changed due to waveform length alteration
Solution Approach 1:
The audio data is segmented into a first part (non-percussion sounds) and a second part (percussion instrument sounds). The master tempo processor applies tempo processing only to the first part, while the second part is processed separately by extracting unit sounds and relocating them based on sounding position data, thereby maintaining timbre consistency for percussion sounds while enabling tempo adjustment for other instruments.
2Speed
If the length of the waveform is changed by master tempo processing, then the playback speed can be modified, but the change in timbre for percussion sounds becomes easily recognizable
Solution Approach 1:
Different processing methods are applied to different parts of the audio data. The first part (non-percussion) undergoes standard master tempo processing with waveform length alteration, while the second part (percussion) undergoes special processing that extracts unit sounds and relocates them based on sounding position, preserving the original waveform length and timbre characteristics for percussion instruments.
3Reliability
If separate processing is applied to percussion and non-percussion sounds, then timbre consistency is maintained, but the processing complexity increases
Solution Approach 1:
A mixing processor acts as an intermediary that combines the first part audio data (subject to master tempo processing) with the second part audio data (processed by unit sound extraction and relocation). The mixing processor integrates these separately processed parts into a unified output, managing complexity through a structured multi-stage approach with clear functional division.
Data Source
AI summary
A data processing device including: a first audio analyzer that extracts, from audio data of a music piece including a first part and a second part that are acoustically separable from each other, audio data of the first part; a second audio analyzer that generates, from the audio data of the music piece, data of a unit sound of the second part; a third audio analyzer that generates, from the audio data of the music piece, data indicating a sounding position of the second part; a master tempo processor that performs master tempo processing on audio data including at least the first part; and a mixing processor that generates audio data in which the audio data of the first part subjected to the master tempo processing is mixed with audio data of the second part, the audio data of the second part being configured by relocating a sound of the second part.