首先，打开音量控制。
(Open volume control panel)

选择“文件”－“更改设备”－“Intel 82801DB-ICH4 (Alsa Mixer)"
Select "File" – "Device" – "Intel 82801DB-DB-ICH4 (Alsa Mixer)"

选择“编辑”－“首选项”
Select "Edit" – "Preference"

为了让外置扬声器发声，出了已经选择上的选项，还要确保选择上以下几项：
(Ensure the following options are marked.)

Master Surround
PCM
Surround Jack Mode
Spread Front to Surround and Center/LFE
Channel Mode

其中，在“回放”中，保证Master, Master Surround,PCM处于非静音状态
In "Playback",Unmute "Master" "Master Surround" "PCM"
在“开关”中，打开Spread Front to Surround and Center/LFE
In "Toggle", Mark "Spread Front to Surround and Center/LFE"
在“选项”中，Surround Jack Mode 选择 Shared，Channel Mode选择4ch或者6ch
In "Option" Choose "Shared" in Surround Jack Mode
Choose "4ch" or "6ch" in Channel Mode