When using the 606 as a soundcard, you can record anything playing from the 606 directly into your audio editor through the USB cable. This is pretty spesh, as it means that you have a 100% digital recording path, ie : -inf DB noise floor!!!
Of course the digital connections can achieve the same thing - but you need digital connections on the computer to do it, meaning more cash.
Method
Step 1: Setup the 606 as the soundcard for your comp.
Step 2: go to [menu] and go to [USB audio/midi]
Step 3: change the source from 'input' to 'mix' (this transmits audio down the USB cable).
Step 4: set up your audio editor to record (I use Soundforge, but even Audacity would do).
Step 5: hit record, and start playing! You can bash pads live, play sequences, use FX, the filter, whatever and everything will be captured perfectly, with absolutely no noise whatsoever, none at all!!!!
Step 6: edit loop points and save! import back to the 606 for live stuff and extra processing. Repeat ad infinitum - with no noise you can resample forever!!!! mwahahahahaha
This is particularly cool with Recycle!, as you can play drums live, by feel (no quantise) and use Recycle to make them fit the tempo of your track - extra coolness
