A few posts back, I mentioned the Nady RSM-4 ribbon microphone, which is indeed a very good microphone for recording ocarinas, and presumably whistles as well. But I discovered something else that surprised me: Some of these fairly inexpensive headset “Skype” microphones perform very well. They are dynamic mics, and the packaging will usually list the frequency range–and it’s the microphone range, not the headphone speaker range that matters. They are usually either 100-10,000 Hz or 100-16,000 Hz. The latter is better. I’ve looked around for one that goes to 20,000 Hz, and the only one I’ve found is the headset that goes with the Rosetta Stone language learning system. I don’t own it, however, so I can’t comment on how it works for recording whistles or anything else.
[urlhttp://dl.dropbox.com/u/3576175/poison%20ivy.mp3]This[/url], however, is a recording I did with a $25 Plantronics, set, and it’s only the 100-10,000 Hz range. I still think the sound quality is great; nearly equal to the ribbon mic + mixer/interface setup. Of course, it’s no good for recording a group of musicians, or anything like that. But for individual solo recording (or, as in this case, playing along to a recorded backing track), it’s just surprisingly good.
I’ve used various condenser microphones, and not had much luck. As others have pointed out, with a condenser mic, the space you record in becomes much more important. If you don’t have a studio-like space, with “dead” acoustics, that condenser mic will pick up reflected sound from walls at certain resonant frequencies, and you’ll tend to get unwanted amplification or distortion on certain notes, while others will seem weak. I’ve had better luck recording outdoors with condenser microphones, although they still tend to pick up everything: distant traffic, etc. It’s surprising how hard it is to find a truly quiet spot until you actually go out and look for one. But then, I live in Philadelphia.
edit: Note that there’s a touch of reverb added, but not enough, I think, to alter the fundamental character of the sound.
Ubizmo