Well, prologos was completely wrong regarding tides occuring as a result of standing waves i.e. constructive/destructive wave interference. The fact there was no evidence provided to back up the assertion and that the incorrect terminology, understanding and inability to reexamine his position was rather telling. This precedent should be considered in subsequent claims of "understanding" and "education"
As for this topic, clearly there is resonance in musical instruments and a correlation to standing wave theory is valid.
So, 1 for 2 on specific examples. As for the new age woo, let the buyer beware...