How can I extract the audios from .DWV format?

[MitsubachiHoneyB]

DWV SYSD engine PCM audio???

I am new in this and I would like to know the way to export in a compatible audio format the voices of the visual novel "True Blue 2002", I don't know how to export this type of audios of ".DWV" format because the software that they used to create the game is very old and unknown.

I tried to export them in raw formats in Audacity but when I do it the sound is heard with a strong static that does not let me hear anything and does not help me. I also used GARbro which recognizes these audios as files but when I want to listen to them, it doesn't run them and when I play the visual novel, it gets stuck and closes due to compatibility errors.

Please, it would be helpful if there is a way to explain me how to do it or if you can export the files for me. Thank you.