2 Sound Output

EV3 has 4 types of sound output: ➀play preset sound, like “beep”; ➁play a note; ➂play a tone ➃play a wav file.

2.1 Sound class

Usage:

import lejos.hardware.Sound;

2.1.1 Fileds

Type Field
int C2
int FLUTE
int PIANO
int VOL_MAX
int VOL_SETTING
int XYLOPHONE

2.1.2 Methods

beep()

playNote(int[] inst, int freq, int len)

// instrument:PIANO, frequency:1000Hz, length:5s
Sound.playNote(Sound.PIANO, 1000, 5000);

playTone(int aFrequency, int aDuration, int aVolume)

// frequency:C2, duration:2s, volume:50%
Sound.playTone(Sound.C2, 2000, 50);

playSample(File file, int vol)

Check out the Sound (leJOS EV3 API) for more info of the Sound class.

Note-to-Frequency chart

In case you need it.

Sound 1 2 3 4 5 6 7 8
G♯ 52 104 208 415 831 1661 3322  
G 49 98 196 392 784 1568 3136  
F♯ 46 92 185 370 740 1480 2960  
F 44 87 175 349 698 1397 2894  
E 41 82 165 330 659 1319 2637  
D♯ 39 78 156 311 622 1245 2489  
D 37 73 147 294 587 1175 2349  
C♯ 35 69 129 277 554 1109 2217  
C 33 65 131 262 523 1047 2093 4186
B 31 62 123 247 494 988 1976 3951
A♯ 29 58 117 233 466 932 1865 3729
A 28 55 110 220 440 880 1760 3520