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生成音楽ワークショップ

「紙のレコード」の作り方
- 予め吹き込むべき音響のないレコード編 -

2013年12月22日 at YCCschool
城一裕(IAMAS)、金子智太郎(東京藝術大学)
用意するもの
- Adobe イラストレーター(CS以降)
- ビニールカッター(例: silhouette CAMEO)
- 紙、カッター、ハサミ
- レコードプレイヤー
0

Tips:
サイズ: A4
カラーモード: RGB

新規ドキュメント
*ファイル > 新規
1

線の幅を0.01ptに
*線: 0.01pt
2

Tips:
塗り > 無し

円を描く (幅: 150 mm, 高さ: 150 mm)
*楕円形ツール
3

Tips:
円の直径(150mm)
よりも線を長くする

線を引く
*直線ツール
4

Tips:
30° = 12分割
22.5° = 16分割
10° = 36分割

線を回転させる
*オブジェクト > 変形 > 回転 (コピー)
5

中央に整列
*円と線を両方選択して、垂直・水平方向中央に整列
6

円を最前面へ
*円を選択 > 重ね順(右クリック)> 最前面へ
7

円を弧に分割
*はさみツール> 交点を切断(交差)
8
*向きは反時計回り
Tips:
大きさ:振幅
(0.2-0.05mm)
折り返し:ジグザグ
の数(最大100)
ポイント:波形

ジグザグを弧に適用
*効果 > パスの変形 > ジグザグ

- 滑らか≒サイン波
- 直線≒ノコギリ波
ジグザグ無しは無音
9
周波数 = ジグザグの数
(Hz)

例: 1200
   0440
   0075
   00.55

(360 / 弧の角度)

(1 - 100)

=
=
=
=

100
500
100
100

(360
(360
(360
(360

(0 - 360)

/
/
/
/

22.5)
22.5)
360)
360)

(回転数 / 60)
(33, 45) (秒)

(45 / 60) 
(33 / 60)
(45 / 60)
(33 / 60)

周波数とジグザグの数との関係
10

線を消す
*すべての線を選択 > 編集 > 消去
11

アピアランスを分割
*すべてを選択 > オブジェクト > アピアランスを分割
12

↖

Tips:
ジグザグ側を
直線につなぐ

全ての端点をつなぐ
*ダイレクト選択ツール
13

すべての弧をつなげる
*オブジェクト > パス > 連結
14

中央の穴をつくる (幅: 7.25 mm, 高さ: 7.25 mm)
*楕円形ツール
15

中央に整列
*2つの円を両方選択して、垂直・水平方向中央に整列
16

データを保存する タイトルと名前をつける
*ファイル > 保存 (例: beats-jo_kazuhiro.ai)
17

レコードを切り出す
*ファイル > Cutting Master 2 for Craft ROBO > カット・プロット
18

レコードを切り出す - 1. はさみ
19

Tips:
真ん中の丸に
×をつける

レコードを切り出す - 2. カッター
20

演奏!
例-0

100

a wave (100)
* 分割無し、一つのジグザグ
例-1

25

37

25
43
32
37
32
37

beats (25-32-37-43)
* 16 分割(22.5°)、 一つ飛ばしに等間隔に 8 つのジグザグ
例-2
38

38

38
22

30
38
45

mario (38-30-38-45-22)
* 32 分割(11.25°)、異なる間隔で 7 つのジグザグ
例-3

26 (7.5°)
82 (82.5°)
0 (90°)
26 (7.5°)
32 (22.5°)
0 (30°)
28 (30°)

82 (82.5°)
26 (7.5°)

oops by park seul gi
* 不均等に分割(7.5°, 22.5°, 30°, 82.5°, 90°)、様々なジグザグ
参考文献
* 城一裕, カッティング・レコード - 予め吹き込むべき音
響のない(もしくはある)レコード盤の提案, 音学シンポ
ジウム2013, 情報処理学会音楽情報科学研究会第99回研
究発表会, 2013年5月.
* Jo, K., Ando, M., cutting record – a record without
(or with) prior acoustic information, in the
proceedings of NIME (New Interface for Musical
Expression) 2013, pp. 283-286, 2013.
* Jo, K., jojporg, How to make a record without
prior acoustic information, instructables, http://
www.instructables.com/id/How-to-make-arecord-without-prior-acoustic-inform/, 2013.

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「紙のレコード」の作り方
 -予め吹き込むべき音響のないレコード編-