Yesterday I started with kathe's cd's (Still early for coaching, if I ever do it). Getting on the 220 hz mark starting from higher pitchs is quite easy, but I am struggling with getting there from lower notes. The main issue is that she uses like 5 steps to go from E3 to A3, and I can only produce three different notes, at least for now..
Unfortunately, Maybe I worked a bit too much. It hurts now.
Overtone analyzer proved to be quite an improvement compared to other programs. My big issue is that since I have abolutely no musical training, I have it quite hard identifying the notes played on the recordings, so I have to analyse them first so in order to get a more graphical cue. I am waiting to receive a tuner by mail, but I think I could use my brother's digital guitar tuner in the meantime.