Hi
1. I will change the unplayable notes to ? as suggested.

2. The program uses independent voices, which CAN cross. In my example, the melody notes are stem-up and the other voices are stem-down. Of course, you can't tell with the semibreve!

3. HARMONY can display using Open score mode, which shows each voice separately. You can actually specify that each voice is Treble, but there is no score mode yet to display them all on one staff.

The use of a bass clef (i.e. piano style score) was dictated by the existing program capabilities. It would take more changes to show everything on the Treble clef, but not impossible.

4. Hammer on and Pull off can be already shown on the score by using the slur (although present not in this example), but not yet on the tab. It needs more work to be able to implement such tab-specific features, and is quite tricky. I would like to get the basic tab sorted before adding these features.

5. The program allows only for preset tunings at the moment, but I intend to add a Custom instrument feature in which you can specify the number of strings and the tuning or each string. This is quite a complex piece of work, because I have to cope with updating the file format so that the tuning details can be saved with the tune, and reloaded later.

In the short term, I can add specific tunings on request. As an example, the program can currently use one open tuning (I think it is Open G) which is just the one I had handy. If you post any that you specifically want, I will put them in before releasing it.

Thanks for the feedback - it is very valuable and will help me to provide what is needed.