@echo off
cd /d "%~dp0"
setlocal enabledelayedexpansion
for /f "delims=" %%a in ('dir /b /a-d *.mp3') do (
    set "StrOld=%%~na"
    for /l %%i in (0 1 9) do (
        set "StrOld=!StrOld:%%i=!"
    )
    set "StrNew=!StrOld!.mp3"
    ren "%%a" "!StrNew!"
)
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@echo off
for /f "delims=" %%i in ('dir /b /a-d *.mp3') do (
	for /f "tokens=1 delims=0123456789" %%a in ("%%~ni") do (
		ren "%%i" "%%a%%~xi"
	)
)
pause
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