Flash sequencer / music app engine

Hi. I’ve been searching around for a sound engine or library that can handle playing sounds in sync. I know this is definitely possible in flash player 10 but I’m quite certain there are methods for doing it with earlier versions as well.

The ones I’ve found so far is a bit too advanced, more like sampleplayers.

The basic need is to be able to place loops of different kinds on a musical grid and have them play back in sync. Much like e-jay works.

Anyone knows of such thing?