I do apologize for the crackling. You can skip this if sound quality matters to you at all! If you persist and do it, you just may find yourself with a lengthened neck.
The previous lesson referred to is From clarifying the hips to turning and lifting the head. And I’ll investigate whether it was my turtleneck sweater interacting with the mic that caused this sound!
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http://feldynotebook.com/Krauss+Fall+2011+ATM+1C