You know the drill.
- Use your real 909s, TR09s, or 909 sample packs. You can use other instruments/synths/whatever to supplement the track, but 909 sounds should take center stage.
- Post your track on September 9.
Bonus points: Use 909 sounds exclusively.
In case you don’t have any 909 samples handy, Beat Battle 101 sample pack had some 909 samples in the pack. Here ya go: