Voicing filter

[mkonik]

I think it would be good to add voicing filter. It should be simple as in JRP. Maybe some kind of tree filtering, from most general. After choosing most general new list opens (with types of scoring) and then third list with all kinds of scoring that are used in the files. It could look like below:

1. vocal
    1 voice
    2 voices
    more
        3 voices
        4 voices
        ...

2. instrumental
    solo instr.
        pf
        vl
        ob
        ...
    chamber
        ensemble
        quartet
        quintet
        ...
    orchestral
        symphonic
        wind
        string
        ...

3. vocal-instrumental
    solo voice with acc.
    duetto with acc.
    coro with acc.
    coro with orch.
    ...

[craigsapp]

This is related to preliminary work on the instrument spreadsheet:

https://bit.ly/popc2-instruments