"Custom Audio Block: Access mediated by OS"
This part is the most interesting part of the leak. Apparently it means that a part of the OS resources (some memory and one of the 2 cores supposedly) will be reserved for the audio in addition of the hardware encoder/decoder.
The OS memory and 2 cores will then manage the scheduling and the Audio Processor will encode and decode the MP3 streams.
We could compare it with the XOne Audio:

- ACP for scheduling and management on XOne would be (to be confirmed) the PS4 "Custom Audio Block: Access mediated by OS"
- ASP for chat and audio would be on PS4 the "encoding and decoding for voice chat"
- AVP is 100% reserved for Kinect on XOne.
- A part of the Shape audio (XMA decoder 512 voices) is similar to the "encoding and decoding 200+" streams on PS4 Audio processor.
- The rest of the Shape audio processor is for additional audio processing.







