刚在京东买了个笔记本音箱
1、编译内核
Device Drivers-->
Sound card support-->
<*> Advanced Linux Sound Architecture --->
[*] USB sound devices --->
USB Audio/MIDI driver
2、将usb声卡设置成默认声卡
2.1、查询声卡
cat /proc/asound/cards
0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xf0600000 irq 41
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xcdefc000 irq 17
2 [default ]: USB-Audio - Logitech Z305
Logitech Logitech Z305 at usb-0000:00:1a.0-1.2, full
2.2、将罗技的usb声卡设置成默认声卡
vim ~/.asoundrc
defaults.pcm.!card default
defaults.ctl.!card default
3、用 alsamixer -c 2 调整第三块声卡的音量
其他usb音箱应该也差不多
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