6 You can combine two parts on the same staff using the part
7 combiner. For vocal scores (hymns), there is no need to add solo/a2
8 texts, so they should be switched off.
15 \context Voice
=one
\partcombine Voice
16 \context Thread
=one
\notes\relative c'' {
21 \context Thread
=two
\notes\relative c'' {