CRT provides a basic architecture and a set of simple modules for audio input/output, soundfile playback, delay, amplitude LFO, filters, frequency shifters, harmonizers, reverbs, some basic FFT synthesis and a granular motor – all passing through a powerful centralized audio matrix allowing interconnections among all modules (including a module back to itself). All modules contain a switch parameter (sw) which mutes the module when off so that only active modules utilize CPU.