SND How To
This How To https://musescore.org/en/node/290616 describes the use of hairpins in voices other than 1. This will fall foul of this bug #297444: Hairpin attached to note other than in voice 1 in score appears on wrong part if the user then generates parts from the score.
I have added a reference to the How To in the bug report, but I repeat the warning here as it seems quite important that it should appear in the forum as well as the issue tracker.
Comments
Also #58031: Dynamics/hairpin range for Voice
I saw the bug report first so I put a similar note also.
In the example in the How to, you can enter the hairpins on the whole note in voice 1 then shorten them using the shift + arrow keys (actually starting in version 3.5 by dragging them also) and the hairpins will only affect the dynamic of the whole note during the invisible rests' durations.
I didn't mention in the bug report that I said to use an unused voice in the How to. I didn't mention that voices are used in generating parts, but if you use voice 2 for the second instrument on a staff, then voice 3 would normally be the first unused voice though it is possible (like on a violin) that both voices 1 & 2 might be used for one part so voice 3 would be the first unused voice. And in this case both voices 1 and 2 should be selected for Violin 1 when generating parts.
In that case the whole note would need to go in voice 2, 3, or 4 in the example.
This discussion should be here rather than in the bug report.
The whole note in the example belongs in the same voice as the other notes in its musical line which is normally voice 1. There are a couple of reasons that I can think of quickly. First, parts are determined by voice, the hairpin will be in the same voice as surrounding dynamics so MuseScore will automatically line them up and probably most important, there is no reason to require the user to switch voices in the middle of entering a line of music to later go back and add different voices to adjust hairpins.
As I said the How to can use some clarification, especially in the area you are talking about.
As for how this pertains to the bug report. The user can use voice 1 for notes for instrument 1 with invisible notes in voice 3 as needed then use voice 2 for instrument 2 and invisible notes in voice 4. I say this because voice 1 is usually used for instrument 1 and voice 2 for instrument 2. When parts are generated, use voices 1&3 for part 1 and 2&4 for part 2. Once the bug is fixed all of these instructions will be sorted out. You may ask what happens if there are 3 or more instruments? The user will have to decide if they want to sacrifices some SND specifics or add another staff to facilitate this.
In reply to In that case the whole note… by mike320
It is not just a matter of clarification: until the bug is fixed users following the instructions in the How To will find the hairpins they add in voices 2-4 actually appear in the part for the next instrument stave in the score when the parts are created - i.e. add a hair pin to voice 3 in the flutes stave in an orchestral score and it appears in the oboe part and not in the flute part.
A workaround, as I said, is to use only voice 1 for the hairpins; if you want an up and down hairpin on a whole note, the hairpins would be added to invisible half note rests in voice 1 and the whole note would go in voice 2, 3 or 4. Another possible workaround is to create the parts first before adding the invisible rests and attaching the hairpins in the score.
In reply to It is not just a matter of… by SteveBlower
You are complicating the way it's supposed to work. The bug is a bug and yes it will cause problems until it's fixed but the way it's supposed to work is how I explained it.
You don't add the hairpin to the rest, you:
Add it to the note in the same voice as all of the other notes for that part.
Add invisible rests that line up with where you want the endpoints for the hairpin in a voice that isn't being used otherwise.
Either drag the endpoint (starting in 3.5) or use shift+arrows to adjust the endpoints and the will stop where there are any rests or notes (invisible or not) in any voice on that instrument
When you create parts (once the bug is fixed) the hairpin will be generated for that part only.
To help clarify "Add a hairpin to a note in a voice." To add the hairpin, select only one note in that voice and add the hairpin (I always use < or > but the palette works also). From there, adjust it's length longer or shorter as needed. You would want it longer if the dynamic starts on the first ends part way through the second of a series of tied notes.
In reply to You are complicating the way… by mike320
Ahah! It has penetrated my thick skull. The hairpins only look like they are not in voice 1 and attached to the rests in the other voice because the dotted lines from the handles are lined up with the rests or rather with the horizontal positions of the rests' endpoints. The hairpins are in voice 1 and therefore will not be affected by the bug - phew, crisis over.
In reply to Aah! I see. The hairpins… by SteveBlower
Very good. I knew there was something you weren't quite understanding correctly.
I review scores for the OpenScore Lieder Project and I'll routinely select entire measures just to see which voice assignments the transcriber used. Everything blue is voice 1, green voice 2 and so on. The How to doesn't show the colors but this can be a helpful tip if you are trying to figure out which voice a hairpin or even a note is in.