Hi Guys, not a question but some information for you: I just heard about an iPhone app that allows very good pitch control without distortions. It is called Tempo Power and costs $4.99. It comes highly recommended by a fellow instructor. I have not used it myself because I do not have any need for it.
Never tried that app. I use tempo magic and it works well. Would love to hear how you like it if you decide to try it. Please keep me posted! 🙂