Yes Libby, I'm not sure why healthranger begins with H=3520 (A7). the sounds are good to me, I feel good, the CO2 Sample and the others. I have experience in Sacred Solfeggio, I tune my guitar and synths in A=443, recently MarinaJacobi.com suggest A=432Hz. to me 443Hz and 432Hz are more harmonius than 440Hz. I will check more about it