(an old Irish word meaning lift or soul in music)
I wouldn’t describe it that way. Only in the sense that the term is a lot newer than you’d think and it’s not really a word.
Well it is but it’s more of sound word like ‘shush’ or ‘cockadoodledoo’
It doesn’t really have a translation because it doesn’t really need one.
The trad equivalent of “soul” or “groove” in jazz or blues, that comes out in the “lift” and spirit of one’s playing.
Thats it.
“NYAH” = the opposite of “BLAH.”
Perfect!
Tommy
In my view,
This aint got Nyah
http://uk.youtube.com/watch?v=mIqv3WfvOHc
This has
http://uk.youtube.com/watch?v=kLFppDPUzTw
Mukade
Ah, so NYAH is a big beard!!
Sorry, Mukade, both your examples are Irish music for tourists. Try this for a proper version:
http://uk.youtube.com/watch?v=3AFRCWg_kOc&feature=related
djm
Ah, so NYAH is a big beard!!
Bollocks. The Dubliners have the Nyah.
Sean Nos is fine, but the Dubliners have the Nyah.
Mukade
Nope, sorry. Clancy Brothers wannabes. 
djm
The Nyah is weak in this one.
Mukade
I greatly expect that the Clancies and Dubliners–if asked, and maybe even if not–would express nothing but substantial mutual professional respect.
“needs more cowbell”