This is from a subs2srs anki deck that I'm studying.
(Edit: Audio on soundcloud )
The original transcription and translation is:
付け忘れんな # Don't forget to record it.
But it sounds to me like:
付け忘れんなぁ{hllhh} or maybe 付け忘れんなぁ{hhlhh}
My ability to hear pitch accents is not great, so I tried to confirm it with VoceVista.
Top is start of clip. Right side is higher pitch.
The first blue line is the start of the れ syllable.
The second is the start of the な. The third is the end of the clip.
I've read Is the word 「やんな」positive or negative? but the pitch accents, if I'm getting them right, don't seem to match, and the long なぁ is also different. Again, assuming I'm hearing and understanding that right, which is not certain.
So what is going on here?
Taking a stab in the dark, I'm guessing that the ん functions as a contraction of るな, which seems consistent with the falling pitch, and then the なぁ is the confirmation seeking version of the な particle that is sometimes pronounced long.
I can't find anything online to confirm this intuition though...