The Q1 is a whistle that plays moderately softly, has a nicely focused sound with just a bit of a raspy edge, has moderate backpressure and pretty strong resisistance, and can take very aggressive play.
As emmline noted, this is not a “pure-toned” whistle, and is not in the same “family” of whistles as the Burkes or Hoovers.
It’s a great little whistle for laying down a dance tune!
Here are some tunes on my Alba Q1:
http://www.flutesite.com/samples/glassbeer.mp3
http://www.flutesite.com/samples/paddy_raffertys_fav.mp3
http://www.flutesite.com/comparison/swingate_alba.mp3
On this page, you can compare the Alba against the other whistles I own:
http://www.flutesite.com/comparison_recordings.htm
I hope this helps!
Subjectively, the Q1 is a fine little whistle, great for home play or for small sessions.  It doesn’t quite have the volume for a big session.  Even though it’s not tunable, mine is precisely in tune at A=440.
One other peculiarity is that ( o x x | o o o ) is somewhat flat for C-natural on this whistle but will let you “punch” the note nicely. For a sustained C-natural on the Q1 I use ( o x o | o o o ) as it is nicely in tune and a very clear note.
–James
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