调整 PCM 音量？

Question

主音量 100%、应用程序/流 100% 的默认音量通过我的耳机太大声。

我可以调整应用程序或调低主音量，但如果新应用程序发出声音，那就是震耳欲聋。此外，在摆弄均衡器之前，主音量已重置为 200% - 所以我现在有点害怕依赖它

目前我正在调整主，但我已经接近 25%，这意味着稍微增加通常会使它变得太大声。

以前使用 ALSA 时，我可以将 PCM 音量设置为 25%，然后将主音量从 0-100% 调整。但是现在在脉冲音频中，如果我设置 PCM 音量然后更改主音量，PCM 将重置为 100%。

有什么建议？我几乎不再听音乐了，因为我现在（有些不理智地）害怕它

Answer 1

From Ubuntu 9.10 the GNOME mixer behaviour changed thus making sound mixing done by Pulse Audio inconsistent. Depending on the distribution version you run you may also suffer from this. According to bug #322909 #30 it may help to ignore PCM volume settings rather than mergin them by editing /usr/share/pulseaudio/alsa-mixer/paths/analog-output.conf.common as root and changing the entry

[Element PCM]
volume = merge

to

[Element PCM]
volume = ignore

After that a system reboot is needed for changes to take effect.

There may be other options in this file (that controls ALSA/Pulseaudio) you could try out if the above does not help. There are some explanatory notes on possible settings.

Don't forget to backup the original file before you apply changes.