soundmodular
soundmodular is a library of functions designed to perform real-time signal processing on blocks of audio. Each function takes inputs and outputs in a similar fashion, hence allowing them to be aggregated into a signal chain to imitate modular synthesis.
One of the long term goals is to use soundmodular as a framework to build additional modules that can be plugged into the signal chain. This calls for a set of conventions, IO specifications and if necessary, abstract classes that define what constitutes a sound module.
The library is available here.