ecmascript style

libpsynth: This is a powerful C++ library for the building of synthesis software. It provides, among other things: abstraction over the audio devices of the system, basic audio synthesis classes (oscillators, filters, etc.), a system of connectable synthesis modules with a generic API, classes for the development of interactive synthesizers with features such as automatic module linking, MVC and facade layers, classes for the synchronization of synths over the network using OSC, a framework for easy application creation, etcetera.

c++ game music emulator libs

not that I have at all been impressed with EAs iphone software, but this claims to have some solutions for allocating memory in a lowmemory environ

audio analysis tools

requires direct x for some reason

this might be useful.