Thanks for posting the link to Hein's blog which I was previously unaware of. http://www.ethanhein.com/wp/2014/blues-tonality/ http://www.ethanhein.com/wp/2014

Thanks for posting the link to Hein's blog which I was previously unaware of. http://www.ethanhein.com/wp/2014/blues-tonality/ http://www.ethanhein.com/wp/2014/blues-tonality/ Especially of interest.