Seems like a promising concept, the act of matching waves based on hints seems intriguing to me, especially considering where this could be taken if explored further as a concept. However unfortunately I also had the same problem as the others, I didn't manage to overcome the first puzzle. I expect it is as "Master Builder" noted, a case of the necessary frequency being too specific to hit. It would had gone a long way in improving playability if there were some sort of indicators implemented - hot & cold style - as you approach the correct wave length.