Improvement of Frequency-Analysis Precision for Low-frequency Components and Application to Development of Audio-MIDI Conversion Tool

DOI IR Web Site

Bibliographic Information

Other Title
  • 低域部の周波数解析精度の改善とオーディオ-MIDI変換ツール開発への応用
  • テイイキブ ノ シュウハスウ カイセキ セイド ノ カイゼン ト オーディオ-MIDI ヘンカン ツール カイハツ エ ノ オウヨウ

Search this article

Abstract

Research Notes

Realization of Audio-MIDI conversion tools are requested for creation of playback-control data such as for MIDI-Karaoke machines, and for development of an automatic music notation system. In these days, a Generative-AI technique is highly advanced. For increasing quality of music generation, we can also provide MIDI contents for machine learning by converting a large quantity of waveform- audio contents. In these applications, precisions of converted MIDI data from audio signals and time- frequency analysis play an important role. However, there are two kinds of problems on analysis of low-frequency components. One is difficult to increase resolution of frequency analysis without sacrificing temporal analysis resolution. The other is difficult to analyze missing fundamental components in recorded audio signals. In this paper, we propose an improved generalized harmonic analysis method, which can increase precision of low-frequency components and compensate predicted fundamental components in a time-frequency analysis. And we report applying our improved analysis method, to our developing audio-MIDI conversion tool.

Journal

Keywords

Report a problem

Back to top