Because now every output of an synth or sampler is connected and allready prepeared to record.
so i only do some basic sequencing with pc and all other things like sweeps or sample- and sound- fx i do in realtime with the knobs and faders of emu-virus-orbit-rolandmt and record them ( midi and audio )
After this i look for the best parts of the one-man-jamsession cut all of these parts into a pool and rearrange it until the soundarrangement fits for mixable tune or i start again for shaping sounds sending them throug any pedals or effectsections and so on.
In a few weeks you can listen to new tunes made in this way.

Please excuse my bad english knowledge.