Abstract: A controller, method, system, and computer-readable medium, for producing control signals. The controller comprises a pressure sensor, a hinged input mechanism configured to receive input forces and direct them towards the sensor, and a processor. The processor is configured to receive a signal from the pressure sensor indicating that the hinged input mechanism is being depressed or released and, based on the received signal, to determine, during a time interval, a rate of change of pressure detected at the sensor. The processor also generates a control signal associated with the hinged input mechanism, wherein the control signal comprises a velocity characteristic representing a speed at which the hinged input mechanism is depressed or released, and the velocity characteristic is based at least partly on the determined rate of change of pressure. In one example embodiment, the control signal is an audio control.

Abstract: An apparatus for embedding a watermark in an audio signal, the apparatus comprising: an input operable to receive the audio signal; a watermark adapting unit operable to receive the watermark from a watermark generating unit and adapt the profile of the frequency spectrum of the watermark to correspond to the profile of the frequency spectrum of the input audio signal, and watermark embedding means operable to embed the adapted watermark in the audio signal, the watermark embedding means including a watermark gain amplifier operable to apply a gain to the watermark before the watermark is embedded in the audio signal in accordance with a gain signal generated by a watermark gain value generator, wherein the watermark gain value generator is operable to adjust the gain applied to the watermark, the gain being determined in accordance with the presence of component of at least one peak having an amplitude above a threshold is described