There is no OS yet.
There is, though, this Aksy project, which aims to create a great substitute for AK.Sys. There have been major improvements like:
- You can actually transfer files to the MPC4000
- AksyFS: mount the sampler's memory and disks as a file system on the host system
- And a GUI: Aksui,
For more info, check this out:
http://walco.n--tree.net/projects/aksy/timeline
http://walco.n--tree.net/projects/aksy/wiki
In any case, about the OS, I have managed to get one or two hackers interested. In fact, there is a list that considered the fact of porting the linux kernel, which is tickless at the moment (RealTime kernel)
I will not give up! Maybe one day we can put up a group of developers to bring up some linux-based Sampler OS... A generic one... and maybe some API for the different samplers around.