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How to compose a song like Tetsuya Komuro の訳．

まず曲を4パートにわけて考える．各々のパートは8小節で，4小節の2回繰り返しにしておく．各パートを A, B, C, D とすると，曲の流れは C, A, B, (A, B,) C, A, B, C, D, C, C （半音上げる）．

Cパート（Cメロ）は曲の鍵の部分で，TK風にするには，コード進行を VI, IV, V, I とする．ハ長調なら Am, F, G, C だ．

A, B, D はCパートほど重要ではない．Aパートに関しては，よく知られたコード進行を借用するだけでよい．例えばハ長調なら C, G, Am, Em7 とか Am, Em, F, G とか C, G/B, Am, G, F, Em, D, G(7) だ．

B, D パートは（僕の記憶が確かなら）よりシンプルなコード進行が選ばれる．それこそ F, G, C (Am) とか F, C, F, G だ．

さて，GarageBandを開いて適当なダンスリズムを下敷きに，ベースとピアノか何かでコードを入れて，適当にメロディを入れてみよう．

First you need four musical sequences which lasts about 8 measures. Let’s call them A, B, C, D. Each sequences are basically repetitions of two 4-measure sequences.

The song we will compose will have those sequences in this order: C, A, B, (A, B,) C, A, B, C, D, C, C (sharp by a half tone).

The C is the key part of the song. Chords of this sequence is very important. To make a song like TK, use VI, IV, V, I (e.g. Am, F, G, C).

In contrast to C sequence, A, B, and perhaps D are not very important. For example, in A sequence you can choose one of well-known chord sequences like (in C-major) C, G, Am, Em7, or Am, Em, F, G, or C, G/B, Am, G, F, Em, D, G(7).

TK often chooses more simple chord sequences (as far as I remember) in B and D sequences, e.g. F, G, C (Am), or F, C, F, G.

Now you can open GarageBand and start with Rhythm part by filling dance rhythm patterns, put Base and possibly Piano under the above ideas, and try giving a melody to your tune.

日本語訳．