The first is when the input data are too fast to store in their entirety: in order to keep storage requirements practical some level of analysis must occur as the data streams in.
On a more practicallevel, the unit is compact, USB-powered, and has a built-in audio-interface (no extra sound card required for headphone monitoring).
By confronting Mozambique's war-torn past on both a conceptual and a practicallevel, he hopes to play a part in ensuring future generations don't grow up under the shadow of conflict.