There are a couple of pieces in a book that I have of the lute music of Vincenzo Capirola. Here is an example:
http://tobiah.org/measure.jpg It seems to indicate that a half bar should be used at the fourth fret, but I can't figure out any way to get a reasonable sound by playing the measure that way, let alone get the pitches that are indicated on the grand staff. It sounds correct if I just play the grand staff as written, ignoring the IV{ marking, but I feel that I am missing something. Thanks, Tobiah