Environmental reverberation processor

A system for rendering a sound scene representing multiple sound sources and a listener at different positions in the scene which might include multiple rooms with sound sources in different rooms and obstacles between a sound source and the listener in the same room, with each room characterized by a reverberation time, said system comprising:

• a plurality of source channel blocks, each source channel block implementing environmental reverberation processing for an associated source and each source channel block including:
• an input for receiving a source signal and providing direct and early reflection feeds, and mono late reverberation feed;
• a direct encoding path, coupled to receive said direct feed and to receive direct path control parameters specified for the associated source, said direct encoding path including an adjustable direct delay line element, a direct low-pass filter element, a direct attenuation element, and a direct pan element, with all direct path elements responsive to said direct path control parameters;
• an early reflection encoding path, coupled to receive said direct feed and early refection control parameters specified for the associated source, said early reflection encoding path including an adjustable early delay line element, an early low-pass filter element, an early attenuation element, and a early pan element, with all early reflection elements responsive to said early reflection control parameters;
• a late reverberation encoding path, coupled to receive said late reverberation feed and to receive late reverberation control parameters specified for the associated source, said direct encoding path including an adjustable reverberation delay line element, a reverberation low-pass filter element, and a reverberation attenuation element, with all late reverberation path elements responsive to said late reverberation control parameters;
• a reverberation bus having a early sub-bus coupled to an output of the pan early element of each source channel block and an late reverberation line coupled to an output of each reverberation attenuation element;
• and
• a reverberation block, coupled to said reverberation bus, having an early reflection unit coupled to said early sub-bus, for processing the outputs from the early reflection paths of said plurality of source channel blocks, and said reverberation block having a late reverberation unit coupled to the late reverberation line of said reverberation bus, for processing the outputs of the late reverberation paths of said plurality of source channel blocks.