I'm willing to bet that playing Led Zeppelin backwards does the same thing. Chances are...they do absolutely nothing.

Likely a better idea to waste your money on good nutes, better lights, better soil, better ventilation, fancy gadgets...like ph meters, light meters, ppm meters, and sing to the plants.
Rusty Trichome Reviewed by Rusty Trichome on . Sonic Bloom Has anyone ever tried the Sonic Bloom system? I read about it in the Cannabible 2, and it uses a CD to play certain frequencies to make the plants more receptive to taking in nutrients. Its supposed to "double" the harvest. heres the website Sonic Bloom - Organic Nutrients for your plants, garden or farm Rating: 5