[Enhancement] 432Hz Batch Converter - "Source" option for output format

[NintendoManiac64]

I have a slew of intermixed OGG vorbis and MP3 audio files, but the problem is that each file is located in their own sub-folder so I can't just separately convert all of the OGG vorbis files and then subsequently convert all of the MP3 audio files.

Furthermore, the reason they're in sub-folders is because they're actually used by a piece of software that pairs each file with a plain text config file that includes the file name and file extension of a given audio file, so I need to resulting audio format to remain unchanged unless I want to somehow go through and manually edit hundreds of config files.