代码：REM REPLAYGAIN_TRACK_GAIN
--------------------
例：
TITLE "only my railgun／late in autumn"
FILE "CDImage.ape" WAVE
TRACK 01 AUDIO
TITLE "Only my railgun"
REM REPLAYGAIN_TRACK_GAIN 8.35 dB //正值为增大，负值为缩小
REM REPLAYGAIN_TRACK_PEAK 1.000000
INDEX 01 00:00:00
--------------------
例：
TITLE "only my railgun／late in autumn"
FILE "CDImage.ape" WAVE
TRACK 01 AUDIO
TITLE "Only my railgun"
REM REPLAYGAIN_TRACK_GAIN 8.35 dB //正值为增大，负值为缩小
REM REPLAYGAIN_TRACK_PEAK 1.000000
INDEX 01 00:00:00
