I'm simultaneously working my way through Jazz Piano Jump Start and Diane Reeves' Define Your Voice, while also binging on Diane's concerts (on YouTube). These courses are taught differently and each one is amazing. Diane brings us into her process. She is so articulate about her artistry. Peter Martin and Adam Maness give a lecture and then Adam guides students through practice sessions. In the first lesson, I learned about intervals and started ear training and playing by ear. I need both courses if I'm going to develop my vocal instrument and interpret a lyric. I couldn't be more pleased with these courses.