From the museum site:
Download free recordings of classical music performed live in the museum’s Tapestry Room. These exclusive recordings from our regular concert series feature performances by acclaimed master musicians and up-and-coming young artists. A new program is posted every two weeks, so check back often, or receive automatic updates delivered directly to your computer or portable mp3 player with a free subscription.
You are free to share and reproduce these podcasts, and pass this great classical music along to your friends and family. The same goes for the individual tracks you’ll find sorted by musician and composer in the Music Library. We only ask that you let people know where you found it, and don’t alter the recording or use it commercially.