As far as the MC 909 goes it is swinging like the mpc's. If you dont believe me try this.
How I swing
my MC-909:
1. Make a dope beat in regular pattern mode
2. Stop the beat and make sure you are in pattern mode by simply pressing the pattern button or exit several times.
3. Press the edit function key which should bring you to pattern edit mode.
4. Hold down the shift key then press the edit quantise function key.
5. The word "Grid" should be highlited, simply turn the data wheel to shuffle which should be the next choice.
6. Arrow down and change the percentage with the data wheel to 69.
7. Press f6 to execute then go back to pattern mode.
..Once you press play you will see the 909 swing like the pro's. 69 usuall works for club like uptempo rap, but the cool part about the 909 is you can swing it live while it is playing by simply pressing while you adjust the percentage and hear the MC909 swing right before your precious little ears. The mc-909 also has a groove feature where it will swing the beat to preset templates like R&B, Regae, Techno, and whatever else. I usually like to shuffle my own swings live and save the changes. You can even pick which "parts you want to swing by muting the ones you dont want to swing.
*Cool MC-909 tip*
I would make a dope drum pattern (no synth or melodies just percussion), swing it with a 69% shuffle, compress them and add effects, thei i would resample the whole 2 or four bars and have the dopest breakbeat sample which you can then time streatch, or flip it in reverse and lay a whole different drum, then you can swing that whole thing, add your bass lines and melodies... or you could lower the pitch on th loop and chop it up and have a whole new grimy, hardcore type drum rhythm set..... Have I made my pont clear about the Roland Mc-909 or do you need more
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BE TRUE TO THE GAME AND THE GAME WILL BE TRUE TO YOU!! KEEP IT PIMPIN!!