ALSA 声音音量低

ALSA 声音音量低

我正在运行带有 ALSA 声音的 Ubuntu 16.0.4 LTS 的 Linux 内核 4.4.0。该发行版pulseaudio默认附带,但我卸载了它,以便直接使用 ALSA 运行所有声音。

安装后pulseaudio,声音工作正常,因为我能够很好地听到系统声音。但卸载后pulseaudio听不到任何声音。

声音确实产生了,但音量太小,你听不到任何声音。

我将此声卡的所有播放音量设置为最大 100%,alsamixer但这没有帮助。

知道这里可能出什么问题吗?

的输出cat /proc/asound/cards是:

 0 [HDMI           ]: HDA-Intel - HDA Intel HDMI
                  HDA Intel HDMI at 0xf7430000 irq 33
 1 [NVidia         ]: HDA-Intel - HDA NVidia
                  HDA NVidia at 0xf3080000 irq 17
 2 [amplifier      ]: USB-Audio - 4.1 amplifier
                  4.1 amplifier at usb-0000:00:14.0-5, full speed

我的声音是4.1 Amplifier设备,它是card 2

中的放大器部分/var/lib/alsa/asound.state是:

state.amplifier {
    control.1 {
            iface PCM
            name 'Playback Channel Map'
            value.0 0
            value.1 0
            value.2 0
            value.3 0
            value.4 0
            value.5 0
            value.6 0
            value.7 0
            comment {
                    access read
                    type INTEGER
                    count 8
                    range '0 - 36'
            }
    }
    control.2 {
            iface PCM
            name 'Capture Channel Map'
            value.0 0
            value.1 0
            comment {
                    access read
                    type INTEGER
                    count 2
                    range '0 - 36'
            }
    }
    control.3 {
            iface MIXER
            name 'Mic Playback Switch'
            value false
            comment {
                    access 'read write'
                    type BOOLEAN
                    count 1
            }
    }
    control.4 {
            iface MIXER
            name 'Mic Playback Volume'
            value.0 6144
            value.1 6144
            comment {
                    access 'read write'
                    type INTEGER
                    count 2
                    range '0 - 8065'
                    dbmin -2400
                    dbmax 750
                    dbvalue.0 -1
                    dbvalue.1 -1
            }
    }
    control.5 {
            iface MIXER
            name 'Line Playback Switch'
            value false
            comment {
                    access 'read write'
                    type BOOLEAN
                    count 1
            }
    }
    control.6 {
            iface MIXER
            name 'Line Playback Volume'
            value.0 6144
            value.1 6144
            comment {
                    access 'read write'
                    type INTEGER
                    count 2
                    range '0 - 8065'
                    dbmin -2400
                    dbmax 750
                    dbvalue.0 -1
                    dbvalue.1 -1
            }
    }
    control.7 {
            iface MIXER
            name 'Speaker Playback Switch'
            value true
            comment {
                    access 'read write'
                    type BOOLEAN
                    count 1
            }
    }
    control.8 {
            iface MIXER
            name 'Speaker Playback Volume'
            value.0 122
            value.1 122
            value.2 196
            value.3 196
            value.4 196
            value.5 196
            value.6 196
            value.7 196
            comment {
                    access 'read write'
                    type INTEGER
                    count 8
                    range '0 - 197'
                    dbmin -3693
                    dbmax 0
                    dbvalue.0 -1406
                    dbvalue.1 -1406
                    dbvalue.2 -19
                    dbvalue.3 -19
                    dbvalue.4 -19
                    dbvalue.5 -19
                    dbvalue.6 -19
                    dbvalue.7 -19
            }
    }
    control.9 {
            iface MIXER
            name 'Mic Capture Switch'
            value true
            comment {
                    access 'read write'
                    type BOOLEAN
                    count 1
            }
    }
    control.10 {
            iface MIXER
            name 'Mic Capture Volume'
            value.0 4096
            value.1 4096
            comment {
                    access 'read write'
                    type INTEGER
                    count 2
                    range '0 - 6928'
                    dbmin -1600
                    dbmax 1106
                    dbvalue.0 -1
                    dbvalue.1 -1
            }
    }
    control.11 {
            iface MIXER
            name 'Line Capture Switch'
            value true
            comment {
                    access 'read write'
                    type BOOLEAN
                    count 1
            }
    }
    control.12 {
            iface MIXER
            name 'Line Capture Volume'
            value.0 4096
            value.1 4096
            comment {
                    access 'read write'
                    type INTEGER
                    count 2
                    range '0 - 6928'
                    dbmin -1600
                    dbmax 1106
                    dbvalue.0 -1
                    dbvalue.1 -1
            }
    }
    control.13 {
            iface MIXER
            name 'IEC958 In Capture Switch'
            value true
            comment {
                    access 'read write'
                    type BOOLEAN
                    count 1
            }
    }
    control.14 {
            iface MIXER
            name 'PCM Capture Switch'
            value true
            comment {
                    access 'read write'
                    type BOOLEAN
                    count 1
            }
    }
    control.15 {
            iface MIXER
            name 'PCM Capture Volume'
            value.0 4096
            value.1 4096
            comment {
                    access 'read write'
                    type INTEGER
                    count 2
                    range '0 - 6928'
                    dbmin -1600
                    dbmax 1106
                    dbvalue.0 -1
                    dbvalue.1 -1
            }
    }
    control.16 {
            iface MIXER
            name 'PCM Capture Source'
            value Mic
            comment {
                    access 'read write'
                    type ENUMERATED
                    count 1
                    item.0 Mic
                    item.1 Line
                    item.2 'IEC958 In'
                    item.3 Mixer
            }
    }
}

我确实将所有播放通道的音量设置为最大,alsamixer但这不起作用。音量仍然非常非常低。

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