Table 2 The relationship between a URL and its string of pitches when each URL has ten characters.

From: A novel approach for audible acoustic quick response codes

No

URL

String of pitches

Midi file produced by Overture

1

www.edu.cn

F7 F7 F7 C4 B4 A4 D7 C4 G4 D6

a1.mid

2

www.sfw.cn

F7 F7 F7 C4 B6 C5 F7 C4 G4 D6

a2.mid

3

www.blg.cn

F7 F7 F7 C4 F4 B5 D5 C4 G4 D6

a3.mid

4

www.wai.cn

F7 F7 F7 C4 F7 E4 F5 C4 G4 D6

a4.mid

5

www.nt.com

F7 F7 F7 C4 D6 C7 C4 G4 E6 C6

a5.mid

6

www.sby.cn

F7 F7 F7 C4 B6 F4 A7 C4 G4 D6

a6.mid

7

www.yun.cn

F7 F7 F7 C4 A7 D7 D6 C4 G4 D6

a7.mid

8

www.nuo.cn

F7 F7 F7 C4 D6 D7 E6 C4 G4 D6

a8.mid

9

www.edg.cn

F7 F7 F7 C4 B4 A4 D5 C4 G4 D6

a9.mid

10

www.qwe.cn

F7 F7 F7 C4 G6 F7 B4 C4 G4 D6

a10.mid