Link: Olive Inc..
We will not charge for your music, so can't you. Music that you provide to the Olive Orchestra will be available to everyone and is covered by the Attribution-ShareAlike license.
Now this is something we have been waiting. BBC published for limited time all its Beethoven symphonies. Why not publish all available public domain classical music on line. I know there are plenty of people who want to get their performance of Mozart or Rachmaninov some publicity. Olive is hosting these works that must be licensed with CC license.
Update: As Ola pointed out, Rachmaninov died 1943. He belong to a group of composers whose works have fallen in public domain and then sucked back in. I had to check the Finnish copyright law where the life + 70 years was added 1995. Most of the new term extension were added in mid nineties. Before the term extension copyright lasted life + 50 years. Hence the performances that were recorded 1994-1995 could be made public domain or licensed with Creative Commons. Rest of the performances cannot. We have to wait another 8 years for Sergei to be in public domain again. Theoretically we could enjoy public domain Rachmaninov.