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KordDEM
Asked:2022-06-27 20:38:02 +0000 UTC2022-06-27 20:38:02 +0000 UTC

Mpd 不正确的音量值

  • 772

安装了mpd。当您尝试设置音量时，值不完全或根本不正确。

mpc volume 100
volume:100%   repeat: on    random: off   single: off   consume: off
mpc volume 95
volume: 94%   repeat: on    random: off   single: off   consume: off
mpc volume 85
volume: 84%   repeat: on    random: off   single: off   consume: off
mpc volume 72
volume: 71%   repeat: on    random: off   single: off   consume: off
mpc volume 65
volume: 63%   repeat: on    random: off   single: off   consume: off
mpc volume 45
volume: 45%   repeat: on    random: off   single: off   consume: off
mpc volume 33
volume: 32%   repeat: on    random: off   single: off   consume: off
mpc volume 21
volume: 20%   repeat: on    random: off   single: off   consume: off
mpc volume 9
volume:  0%   repeat: on    random: off   single: off   consume: off
mpc volume 2
volume: 19%   repeat: on    random: off   single: off   consume: off
mpc volume 12
volume:  0%   repeat: on    random: off   single: off   consume: off
mpc volume 14
volume: 19%   repeat: on    random: off   single: off   consume: off
mpc volume 15
volume:  0%   repeat: on    random: off   single: off   consume: off
mpc volume 16
volume: 19%   repeat: on    random: off   single: off   consume: off
mpc volume 17
volume:  0%   repeat: on    random: off   single: off   consume: off
mpc volume 19
volume: 20%   repeat: on    random: off   single: off   consume: off
mpc volume 20
volume: 20%   repeat: on    random: off   single: off   consume: off
mpc volume 21
volume: 21%   repeat: on    random: off   single: off   consume: off
mpc volume 22
volume: 22%   repeat: on    random: off   single: off   consume: off
mpc volume 23
volume: 24%   repeat: on    random: off   single: off   consume: off
mpc volume 23
volume: 22%   repeat: on    random: off   single: off   consume: off
mpc volume 9
volume:  0%   repeat: on    random: off   single: off   consume: off
mpc volume +9
volume: 19%   repeat: on    random: off   single: off   consume: off
mpc volume -9
volume:  0%   repeat: on    random: off   single: off   consume: off

配置示例

audio_output {
        type            "alsa"
        name            "My ALSA Device"
        device          "hw:CARD=Codec,DEV=0"
        mixer_device    "default"
        mixer_control   "Line Out"
        mixer_index     "0"
}

混音器输出

Simple mixer control 'Line In',0
  Capabilities: pvolume pvolume-joined pswitch cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 7
  Front Left: Playback 7 [100%] [6.00dB] [on] Capture [off]
  Front Right: Playback 7 [100%] [6.00dB] [on] Capture [off]
Simple mixer control 'Line Out',0
  Capabilities: pvolume pvolume-joined pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 17 [55%] [-21.00dB] [on]
  Front Right: Playback 17 [55%] [-21.00dB] [on]
Simple mixer control 'Line Out Source',0
  Capabilities: penum
  Items: 'Stereo' 'Mono Differential'
  Item0: 'Mono Differential'
  Item1: 'Mono Differential'
Simple mixer control 'Mic1',0
  Capabilities: pvolume pvolume-joined pswitch cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 7
  Front Left: Playback 7 [100%] [6.00dB] [off] Capture [off]
  Front Right: Playback 7 [100%] [6.00dB] [off] Capture [off]
Simple mixer control 'Mic1 Boost',0
  Capabilities: volume volume-joined
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 7
  Mono: 7 [100%] [42.00dB]
Simple mixer control 'Mic2',0
  Capabilities: pvolume pvolume-joined pswitch cswitch
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: Playback 0 - 7
  Front Left: Playback 7 [100%] [6.00dB] [off] Capture [off]
  Front Right: Playback 7 [100%] [6.00dB] [off] Capture [off]
Simple mixer control 'Mic2 Boost',0
  Capabilities: volume volume-joined
  Playback channels: Mono
  Capture channels: Mono
  Limits: 0 - 7
  Mono: 7 [100%] [42.00dB]
Simple mixer control 'Mixer',0
  Capabilities: cswitch
  Capture channels: Front Left - Front Right
  Front Left: Capture [off]
  Front Right: Capture [off]
Simple mixer control 'Mixer Reversed',0
  Capabilities: cswitch
  Capture channels: Front Left - Front Right
  Front Left: Capture [off]
  Front Right: Capture [off]
Simple mixer control 'ADC Gain',0
  Capabilities: cvolume cvolume-joined
  Capture channels: Mono
  Limits: Capture 0 - 7
  Mono: Capture 7 [100%] [6.00dB]
Simple mixer control 'DAC',0
  Capabilities: pvolume pvolume-joined pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 63
  Mono:
  Front Left: Playback 63 [100%] [0.00dB] [on]
  Front Right: Playback 63 [100%] [0.00dB] [on]
Simple mixer control 'DAC Reversed',0
  Capabilities: pswitch
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [off]
  Front Right: Playback [off]

输出混音器设置“线路输出”0%

Simple mixer control 'Line Out',0
  Capabilities: pvolume pvolume-joined pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 0 [0%] [-99999.99dB] [on]
  Front Right: Playback 0 [0%] [-99999.99dB] [on]

输出混音器设置“线路输出”100%

Simple mixer control 'Line Out',0
  Capabilities: pvolume pvolume-joined pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 31 [100%] [0.00dB] [on]
  Front Right: Playback 31 [100%] [0.00dB] [on]

$(seq 0 31) 中 i 的输出；做 amixer set "Line Out" $i; 完成 | grep '左前：'

Front Left: Playback 0 [0%] [-99999.99dB] [on]
  Front Left: Playback 1 [3%] [-99999.99dB] [on]
  Front Left: Playback 2 [6%] [-43.50dB] [on]
  Front Left: Playback 3 [10%] [-42.00dB] [on]
  Front Left: Playback 4 [13%] [-40.50dB] [on]
  Front Left: Playback 5 [16%] [-39.00dB] [on]
  Front Left: Playback 6 [19%] [-37.50dB] [on]
  Front Left: Playback 7 [23%] [-36.00dB] [on]
  Front Left: Playback 8 [26%] [-34.50dB] [on]
  Front Left: Playback 9 [29%] [-33.00dB] [on]
  Front Left: Playback 10 [32%] [-31.50dB] [on]
  Front Left: Playback 11 [35%] [-30.00dB] [on]
  Front Left: Playback 12 [39%] [-28.50dB] [on]
  Front Left: Playback 13 [42%] [-27.00dB] [on]
  Front Left: Playback 14 [45%] [-25.50dB] [on]
  Front Left: Playback 15 [48%] [-24.00dB] [on]
  Front Left: Playback 16 [52%] [-22.50dB] [on]
  Front Left: Playback 17 [55%] [-21.00dB] [on]
  Front Left: Playback 18 [58%] [-19.50dB] [on]
  Front Left: Playback 19 [61%] [-18.00dB] [on]
  Front Left: Playback 20 [65%] [-16.50dB] [on]
  Front Left: Playback 21 [68%] [-15.00dB] [on]
  Front Left: Playback 22 [71%] [-13.50dB] [on]
  Front Left: Playback 23 [74%] [-12.00dB] [on]
  Front Left: Playback 24 [77%] [-10.50dB] [on]
  Front Left: Playback 25 [81%] [-9.00dB] [on]
  Front Left: Playback 26 [84%] [-7.50dB] [on]
  Front Left: Playback 27 [87%] [-6.00dB] [on]
  Front Left: Playback 28 [90%] [-4.50dB] [on]
  Front Left: Playback 29 [94%] [-3.00dB] [on]
  Front Left: Playback 30 [97%] [-1.50dB] [on]
  Front Left: Playback 31 [100%] [0.00dB] [on]

输出混音器设置“线路输出”17% | grep '左前：'

Front Left: Playback 6 [19%] [-37.50dB] [on]
linux

1 个回答

  1. Best Answer

    此行为是 中的错误的结果，该错误mpd已针对21.5.

    通常它在设置音量时只会引起小的跳跃（1-2％），但因为。一方面，板上的音量控制相当粗糙（只有 32 个可能的值），另一方面，驱动程序给出的最小支持级别（-99999.99）的值不正确，然后在 0 区域内有立即跳到19%。

    该怎么办

    • 升级到mpd-21.5（已在 Debian 测试（书虫）中可用）。音量仍然会逐步变化，在 0-19% 的范围内很可能无法调整音量级别，但结果会更充分：如果指定特定值，则会有特定音量等级。
    • 使用软件音量控制（添加mixer_type "software"到配置而不是其他混音器参数）。可以更顺畅地调节音量，但 CPU 的负载会增加。
    • 2

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