Download "SetVolume" from Frodo website.
extract to a folder
make a batch file as volume.bat
setvolume.exe -wave 80
setvolume.exe -cd 50
setvolume.exe -line 80
setvolume.exe -mic 30
Add command line on resume in Frodo
browse to the batch file
or made a batch file by batchrun
it is good for look when resume into Frodoplayer
in Frodo command line, browse to file folder and input file's extension name by yourself. "volume.brs"
It works fine on my car.