Great application, just a few changes wanted...

First I didnt think much of someone elses comment "have option so you dont have to blow", but now I understand it. Some of us non-musicians want just to be able to produce sounds with minimal effort, and thats where it would be really handy, so here is my suggestion to attract even more people to your great program...
1) allow for non-blowing way to play, so that pressing the key and holding acts like blowing -- yes blowing is better, but most of us [non musicians] get tired of blowing, and we just want to use the keyboard
2) on the preview instrument page, have a button to play the instrument, just a few notes to get a feel for how the instrument sounds (like clicking on the instrument plays 10 seconds)
3) for the real musicians, you could come up with a simple device to be a blow-piece, it woudl plug into the data/power connector but just to keep it in place, and it would keep the distance from the microphone (not too close or too far) and have a spit-guard too :-) -- thats a lot to ask, but it would be nice

And as an add-on you could come up with some songs and have they keys highlighted in a "teach me the song" addon, a separate application requiring this one perhaps...

I do like the the program but i dont play it because of the need to blow primarily... i want to see the keyboard and if i do then my angle is wrong and some notes dont come out because i am not blowing at the right angle... I can play the piano a little bit, but i wanted a saxophone/etc sounds which your application does...

like i said many people want to hear the sounds but dont want to put in a lot of effort..... and i think you want to appeal to both the musically inclined and the ones more challenged and impatient ones... :-)

RobertBody about Wivi Band™ 15-in-1