Relatively changing a parametric value using a pressure sensitive user interface element

Abstract

Techniques are disclosed for relatively changing a parameter value from a first value using a pressure sensitive user interface (UI) element. In an embodiment, the techniques include: activating the UI element in response to pressure signals received at the UI element; displaying the first value as the parameter value; converting the pressure signals to corresponding parametric values; presenting the parametric values as feedback concurrently with the converted pressure signals and with the displayed first value; unlocking the activated UI element when the parametric values fall within a first window of the first value for a first time period; after the unlocking of the activated UI element, relatively changing the parameter value from the first value to the parametric values concurrently with the displayed parametric values; and deactivating and locking the UI element in response to a lack of pressure signals received at the touch point of the UI element.