Which AJA card? Mine will output SD live, as well as capture it live. It does the downconvert in real time – just like the 525 card in my HDCAM deck. Of course we’re NTSC for the SD, so maybe there’s a difference there.
And which Editbox? (never really liked them, to be honest, very kludgey) It can use only SD?
Non-linear: all the time and nothing but.