Hey there, I just discovered these fantastic videos dealing with overtonesinging. Understanding the overtones: https://www.youtube.com/watch?v=UHTF1-IhuC0 See it in the MRI Scan: https://www.youtube.com/watch?v=L8km_swzsq0&feature=youtu.be Learn it: https://www.youtube.com/watch?v=HP0iotICL7k Thank you Anna-Maria Hefele and Wolfgang Saus!