I though, that this little toy was lost, but I just found a backup! This was a free personal project 2 years ago with Partrick Müller, who has coded all the backend communication.
Unfortunatley, I had not enough time to finish it, so here is a version without saving functionality.

Fast instructions:
Choose a sound in the browser panel and drag it into a free sequencer slot. Switch on some notes and click the play-button. Play around to learn the other features as soundtransform and effects. Nice, isn’t it ? We will make it better in flash9 :)