soft, gentle music actually does help plants to go faster, more lush. in the case of fruits and vegetables, the production increases and the fruits/veggies grow larger too. i did a study of this back in the 70's with various types of music, and talking, and no music, and no talking. of course, used the same soil, amount of watering, etc. yet both the gentle music and the talking affected growth quite dramatically, when done both separately and together. btw, loud acid rock had a visibly detrimental effect on the plants.