Last Saturday was the TaiHei Ensemble Concert, our Pacific-Rim ensemble. I realized the day of the concert, but every single piece on the program had some degree of improvisation to it, though that improvisation came in many different forms.
Anyway, I highly recommend that you give it a listen. I’ve posted the MP3s on the TaiHei Ensemble Site on the media page. It’s a great ensemble, this concert was four performers: shamisen, percussion/trumpet, saxophone/hulusi, and tuba… I don’t know how many other people can claim they played in a quartet for shami, trumpet, sax, and tuba.