the sound of this microphone is warm and it has a good presence in the low medium, It's a complementary solution to other more aggressive products of the market. It can be used in noisy conditions.

It's a high quality Audio-Technica microphone the only downside is the mic is almost twice the diameter of the AT899, making it more visible, but it doesn't come with the $200 price tag of the AT899. Its also heavier which pulls a little more on clothing its clipped to.

I've been using the AT831b in performance settings for over a year, and I've been thoroughly impressed with it. Autoharps are notoriously hard to mic, but this little dandy does an outstanding job capturing subtleties of sound normally lost when mic'ing with more traditional methods.