I don't know what type of music you were playing, but I do know that plants definately respond to music. There are a lot of mixed thoughts on this, as there is not a lot of scientific info on it, it is more pseudoscience than actual science really, but you can find some great information on it as well. Here's an article about the sonicbloom fert/music combo, but the second half of it has some very good indo about music frequencies and plant grow experiments. http://www.sonicbloom.com/Biotechnews.htm