[unholyone]

That did not answer the issue. Flac.exe is the encoder right. But there is a specific .dll file needed in foobar to call that out to convert a file such as .shn to .flac.

I found out that it is foo_flaccer.dll. Without it you will not be able to choose Flac as the conversion output.

You also need foo_bitcompare.dll in order to do a bit comparison. Without it you will not be able to compare the out of flac to the original shn file to verify that they are bit for bit identical.