使用嵌入式 Linux tinyplay 控制音频的 tinymix

tinymix 控制声音大小使用方法 使用字符方式保险    tinymix "LINEOUT volume" "2"

有的是输入int 但是此处输入输入int时,不行,使用字符串输入可以正常修改

输入tinymix 查看选项和使用方法

root@/test_utils/alsa # tinymix
Mixer name: 'audiocodec'
Number of controls: 16
ctl type num name value
0 ENUM 1 codec hub mode hub_disable
1 INT 1 digital volume 0
2 INT 1 LINEIN to output mixer gain control 3
3 INT 1 FMIN to output mixer gain control 3
4 INT 1 LINEOUT volume 2
5 BOOL 1 LINEOUT Switch On
6 BOOL 1 Left Output Mixer DACL Switch On
7 BOOL 1 Left Output Mixer DACR Switch Off
8 BOOL 1 Left Output Mixer FMINL Switch Off
9 BOOL 1 Left Output Mixer LINEINL Switch Off
10 BOOL 1 Right Output Mixer DACL Switch Off
11 BOOL 1 Right Output Mixer DACR Switch On
12 BOOL 1 Right Output Mixer FMINR Switch Off
13 BOOL 1 Right Output Mixer LINEINR Switch Off
14 ENUM 1 Left LINEOUT Mux LOMixer
15 ENUM 1 Right LINEOUT Mux ROMixer
Usage: tinymix [-D card] [control id] [value to set]

//此处采用字符创方式进行控制 设置完毕,发现更新不及时,此处采用再次查询的方式确认修改是否正确

root@/test_utils/alsa # tinymix "LINEOUT volume" "2"
Mixer name: 'audiocodec'
Number of controls: 16
ctl type num name value
0 ENUM 1 codec hub mode hub_disable
1 INT 1 digital volume 0
2 INT 1 LINEIN to output mixer gain control 3
3 INT 1 FMIN to output mixer gain control 3
4 INT 1 LINEOUT volume 0
5 BOOL 1 LINEOUT Switch On
6 BOOL 1 Left Output Mixer DACL Switch On
7 BOOL 1 Left Output Mixer DACR Switch Off
8 BOOL 1 Left Output Mixer FMINL Switch Off
9 BOOL 1 Left Output Mixer LINEINL Switch Off
10 BOOL 1 Right Output Mixer DACL Switch Off
11 BOOL 1 Right Output Mixer DACR Switch On
12 BOOL 1 Right Output Mixer FMINR Switch Off
13 BOOL 1 Right Output Mixer LINEINR Switch Off
14 ENUM 1 Left LINEOUT Mux LOMixer
15 ENUM 1 Right LINEOUT Mux ROMixer

root@/test_utils/alsa # tinymix
Mixer name: 'audiocodec'
Number of controls: 16
ctl type num name value
0 ENUM 1 codec hub mode hub_disable
1 INT 1 digital volume 0
2 INT 1 LINEIN to output mixer gain control 3
3 INT 1 FMIN to output mixer gain control 3
4 INT 1 LINEOUT volume 2
5 BOOL 1 LINEOUT Switch On
6 BOOL 1 Left Output Mixer DACL Switch On
7 BOOL 1 Left Output Mixer DACR Switch Off
8 BOOL 1 Left Output Mixer FMINL Switch Off
9 BOOL 1 Left Output Mixer LINEINL Switch Off
10 BOOL 1 Right Output Mixer DACL Switch Off
11 BOOL 1 Right Output Mixer DACR Switch On
12 BOOL 1 Right Output Mixer FMINR Switch Off
13 BOOL 1 Right Output Mixer LINEINR Switch Off
14 ENUM 1 Left LINEOUT Mux LOMixer
15 ENUM 1 Right LINEOUT Mux ROMixer
Usage: tinymix [-D card] [control id] [value to set]

播放音频  tinyplay music-44K1.wav

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原文地址：https://www.cnblogs.com/RYSBlog/p/17314987.html