Home / Forums / Melodica technique / Melodica Playing Techniques / Reply To: Melodica Playing Techniques Reply To: Melodica Playing Techniques May 12, 2014 at 11:42 am #2289 jazzman1945Participant Different depths keystrokes affect the sound: if you press deeply and quickly, the sound will be softer; if you press the shallowly , the sound gets unstable attack , which makes it more like a blues harp.