How to notate two nested repeat loops (||: and :||) that finish on the same repeat finish sign :||?

Question

I have made a transcription of a song with the following structure:

Intro, A, B, A, B, A, Coda

The score that I created is the following (the content of the bars was replaced by whole notes for simplicity):

But after some thought, I don't think that the repeat finish sign :|| on bar 15 is considered valid notation in this case. First of all, it does not have a matching repeat start sign ||: (because these are already matching some other repeat finish sign :||). But assuming (as I did) that it is supposed to loop back to the beginning of section A to achieve the structure mentioned above, I noticed that I would have written the exact same score if the piece had the following different structure:

Intro, A, B, B, B, Coda

What notation can be used in this case to achieve the intended structure (besides writting notes on the score or duplicating sections A or B in the score)?

EDIT 1:

I found a new reason to think that the score that I show above is wrong for this case. I thought that the repeat finish sign :|| on bar 15 had precedence over the Dal Segno al Coda navigation mark. But then I found in other post (in the accepted answer, by Aaron) an example where there is a repeat loop with two different endings X and Y (bars 11 and 12, respectively), where:

• Ending X is played on the first and second times (1 and 2);
• Ending Y is played on the third time (3).

Inside ending X, there is a Dal Segno that is taken on the first time. I thought we would only jump to Segno on the second time (i.e., the last time on ending X, but it turns out that we jump on the first time already. Similarly, I see that the D.S. al Coda on my score must mean that we jump to Segno also on the first part, which would correspond to the following structure:

Intro, A, B, A, Coda

In other words, the x3 notation on the repeat finish sign :|| is irrelevant.

EDIT 2:

Clarification: I'm asking for a solution that is not writing notes on the score or duplicating sections A or B in the score because I am using Guitar Pro 8 for two things at the same time:

1. Write this score to then export it to a PDF. For this reason, duplicating is not desired because I wish to have a compact sheet;
2. Generate an audio file (based on the score). For this reason, manual notes won't work for sequencing the different parts for the audio file generating.

I'm trying to have a single Guitar Pro 8 file for both of these things so that I don't need to edit in two different places if changes need to be made in the future.

EDIT 3:

I posted a follow-up question to this one with a different attempt to write the score for this piece of music.

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Related threads:

I found some very informative posts about nested repeats and their mixed usage with Segno/Coda navigation marks, but none of them refer to this specific case where the the outer and inner repeat loops end in the same repeat finish sign :||. The posts I read are:

• Is there a good way to denote nested repeats?
• Is there a way to notate the repeat of a larger section that itself has repeats in it? [duplicate]
• Priority of Da Coda vs. Repeat sign
• Dal Segno al Coda and repeats in Guitar Pro. This last one really confirms what I already suspected, which is that Guitar Pro makes its own assumptions when navigation marks such as Da Segno/Da Coda are mixed with repeat signs and sometimes the playback of the audio is unexpected when compared to the sheet. But I'm not going to talk about Guitar Pro on this question.
• Are there established good practices for how to use musical navigation markers correctly?
• Repeat sign without a match

Answer 1

It's easy to write this in a way that a human player can read (and at least some notation programs, for example Finale).
The repeat in measure 15 is ambiguous. Leave it out and write "2x D.S. (con rep.)" (or "with repeats" instead of "con rep.") so you go back to the segno twice. Then make it clear that the coda is to be taken the third time through and not the second: "3.x al Coda".
The result: intro A B A B A coda.

A lot of musicians will assume that repeats are not made after a "Dal Segno", so it's always safer to make it explicit whether the repeats are to be taken ("con rep."/"senza rep.").

Answer 2

The simplest solution would be to include a note at the beginning of the A section to the effect of "Play A B A B A; take all repeats."

However, since the score must work both written and for playback, I can offer the solution in MuseScore, short of knowing if this will work in Guitar Pro.

The key features are:

1. A section break must be placed at the end of the B section (hard to see here, because it overlaps the D.S.).
2. For both the D.S. and D.S. al Coda, the Play Repeats property must by checked.

Answer 3

There is no way to unambiguously specify what you want without either adding text instructions or adding at least some more music to the score. You could add third and fourth time bars to the end of section B, using DS at the end of the 2nd time bars, a repeat sign at the end of the third time bars (which would be read as going back to the start of section B) and DS al coda at the end of the 4th time bars. However this does not guarantee that a performer will automatically play all the repeats in section A on the second and third times through them - there are styles of music where omitting these repeats would be expected.

Your bars 3 and 6 are both played 6 times. If the first time bars (bars 4 and 7) are both marked 1, 3, 5 instead of 1, and the second time bars (bars 5 and 8) are both marked 2, 4, 6 instead of 2, this would clearly indicate that the repeats are to be played on each pass through. It would however be clearer to write out section A in full without using repeats.