A Vocabulary-Free Infinity-Gram Model Based on Relative Chord Progression for Chord Progression Analysis

田中 一生, 井上 真郷

Bibliographic Information

Other Title

相対的和音進行に基づく和音進行解析のための語彙フリー無限Gramモデル

Description

This paper proposes a specialized language model for chord progression. The models for natural languages are actively studied, and we try to use them for a chord progression model. There is one clear problem; chord progression has a feature that each chord has different meaning depending on the key in music, so chord progression is contrasted as "text containing many multisense words." Existing methods solve this problem by 1) limiting compositions without modulation, and 2) transposing the key into the default key (C major or A minor), but these methods are cannot be applied for "modulation-containing" or "key-unknown" compositions. To solve this problem, we propose the model which deals with keys not directly but indirectly, named "relative chord progression." We validated our method by using jazz compositions, which contain many modulations, and found that our method overcomes existing methods in the sense of achieving the lower perplexity for chord progression.

Journal

IPSJ SIG Notes

IPSJ SIG Notes 2015 (7), 1-6, 2015-02-24

Information Processing Society of Japan (IPSJ)

Details 詳細情報について

CRID: 1573105977706725888

NII Article ID: 110009877759

NII Book ID: AN10505667

ISSN: 09196072

Text Lang: ja

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