いつもお世話になっています。
And forgive me using English..
If you build ＤＸライブラリ from source code (like me), before building ver 3.02c, remember to update additional lib files from DxLib_VC3_02c.exe.
Or, you will get a link error when building your own program. (can not found SetupSoundConvert_DSMP3 function)
(Can someone help me translate this information to Japanese? Thank you.)