Picard can do better when track or folder names contain Windows incompatible chars. To use a generic "_" is too boring and ugly.

I would suggest to use Unicode chars with the following map:

! -> ‼ (Unicode 0x203C) or ❢
? -> ‽ (Unicode 0x203D)
/ -> ∕ (Unicode 0x2215)
: -> ¦ (Unicode 0x00A6) or • (Unicode 0x2022)
"some text" -> "some text"

Of course you can simulate this behavior with many nested $replace() functions, but a single $unicodify() or a checkbox option to the user that will do it all would be a more elegant solution.

Thank you