delphi, directshow dspack

Hi, I need to record everything that is played-back on my pc using directshow package (Dspack), I want a delphi 7 sample application that lists and capture audio from all input devices (mic, lin-in,...) to record live audio and in addition to this devices I need to be able to capture audio that is payed-back on my sound card (everything played-back on sound card) I dont need to capture to a file but to get the buffers representing PCM samples (no encoding) and to be able to set the size of these buffers programatically... (no need to capture to a file)... please provide a sample, and explain in some details how r u going to achieve that... PS: "what u hear" option is very important for me, mic/line-in/aux.. came in second place but also needed.. thanks.