CVNC Set of 3 Chakra Crystal Singing Bowls - 6" A Note, 8" F Note & 10" C Note - Colored Frosted Quartz with Free Carry Case Bag | Meditation, Yoga, Sound Healing & Relaxation Therapy

I actually love these bowls. Built well, it looks, no chips or cracks, and they carry bags look very solid too. They sound great and can get very loud, however, they're a bit out of tune.Now, I'm a bit of a music nerd, so please excuse the rant. But I believe that if an instrument has a specified frequency that is claimed to be tuned into, that's what we should expect from the manufacturer. (If you want just skip to the TLDR at the bottom.)Given that there are no regulations for this type of stuff, you just have to take their word for it. So what happens when and instrument like this is out of tune? You have to find a way to tune it?? I'm not sure if it's even possible to tune these. Maybe you can put water to sharpen the note? Just a theory, but I don't think it's a good idea to do this, but either way a big problem is they are all sharp already! So you'd have to remove material to flatten it??Here's a breakdown of my findings (referenced to A432, which are the ones I ordered): C4 is +18.3 cents sharp, D4 is +27.2 cents sharp, E4 is +12.1 cents sharp, F4 is +8.2 cents sharp, G4 is +41.9 (!!) cents sharp, A4 is +7.2 cents sharp, and finally B4 is -17.2 cents flat.Now, referenced to A440, the breakdown is as follows: C4 is -17.5 cents flat, D4 is -4.5 cents flat, E4 is -19.7 cents flat, F4 is -23.6 cents flat, G4 is +10.1 cents sharp, A4 is -24.6 cents flat, and finally B4 is -49.0 cents flat.As you can see, the bowls are tuned somewhere in between A432 and A440. The human ear could tell a difference if there are tuning errors of about 5-6 cents. However, we perceive tuning difference in intervals, but that's another discussion. My point is, I think that the manufacturer is either 1) not concerned about the quality control in terms tuning and they just care about the structural integrity of the bowl, or 2) they make sure they tune it in between A432 and A440 so they can sell you on both and claiming there is some wiggle room in tuning.I'm not expecting the tuning to be perfect, but I was still disappointed that the perfect fifth is so sharp from the C to G.So, TL;DR: If you are buying this because "A432 is the frequency of healing" then I hope you're ok with "close enough". If you buy this for the purposes of making music, good luck complementing it with other instruments. If you just want to hear cool tones come out of these great-looking bowls, then have fun! In the end, they sound great and maybe 10% of people will actually notice the tuning problem. But for me, it bothers me a bit, especially when they tell you that they are tuned.