Salvador
RF's Swedenborgian
I'm sorry I hope I wasn't insulting.
It is indeed very very subtle. When I get some more precise equipment I plan on making a new more clear version. Complete with a spectrogram and more supporting evidence. Then you can see it!
Oh no, you're fine, it's not your fault that I can't distinguish between 2 tones of subtle difference. I sometimes just have to trust the opinions of those who have a better ear for music.