Yesterday we uploaded all the code of the Audio Processing Framework (APF) to its new home at http://AudioProcessingFramework.github.io/.
So if you need some C++ code, have a look there!
It offers a multi-threaded realtime environment for multichannel applications, a (uniformly) partitioned convolution engine, IIR second order filters (and cascades thereof), a block-based delay line, a C++ wrapper for the JACK Audio Connection Kit, some tools to use the FFTW in C++ and many more things.
Documentation is available at http://AudioProcessingFramework.github.io/apf-doc.
Have a look, try it out and leave feedback at http://github.com/AudioProcessingFramework/apf!
