MP3Gain是個很有用的小工具，它能把一批MP3調(diào)整為統(tǒng)一的音量，操作也很簡單，開源免費還有免安裝版。

以下是官方介紹：

Tired of reaching for your volume knob every time your mp3 player changes to a new song?
MP3Gain analyzes and adjusts mp3 files so that they have the same volume.

每當(dāng)mp3播放器換一首新歌，你的手就得在音量旋鈕上調(diào)整，不累么？

MP3Gain分析和調(diào)整mp3文件，讓它們有統(tǒng)一的音量。

MP3Gain does not just do peak normalization, as many normalizers do. Instead, it does some statistical analysis to determine how loud the file actually sounds to the human ear.
Also, the changes MP3Gain makes are completely lossless. There is no quality lost in the change because the program adjusts the mp3 file directly, without decoding and re-encoding.

MP3Gain不是像普通的規(guī)格化軟件一樣只做“尖端規(guī)格化”，相反，它是采用統(tǒng)計分析的方法去決定文件實際人耳聽起來會有多大聲。

同時，MP3Gain做出的改變是無損的，這是因為程序直接調(diào)整，mp3文件，沒有解碼和重編碼的過程。