Hello.

I apologize if this question is already answered elsewhere. I searched but didn't find exactly what I was looking for.

So...
I work with subtitling for Deaf and Hard-of-Hearing, and every now and then I get to work with a partially finished project from someone else, full of strange work-arounds that they did back then.

The problem i'm facing now is that I have two .SRTs, one of them has music signs and the other has the dialogues and all.
I need to merge the two subtitles tracks seemlessly... that being, I need the music signs to be on top of the dialogue lines, without breaking time signature.

Example:
Dialogue subtitles
1
00:00:29,250 --> 00:00:33,667
Blablablablabla

_______
Music sign subtitles
1
00:01:08,333 --> 00:02:13,708


2
00:02:13,708 --> 00:03:18,708
What i want:
1
00:01:08,333 --> 00:00:29,249


2
00:00:29,250 --> 00:00:33,667

blablablablabla

3
00:00:33,667 --> 00:02:13,708


4
00:02:13,708 --> 00:03:18,708
I tried multiple online options and what i got every time was:

1
00:00:02,250 --> 00:01:08,333


2
00:00:29,250 --> 00:00:33,667
blablabla