Abstract: A sustainer is described for use with resonant strings in instruments like guitars, bases, slide guitars and others. Described sustainers can be handheld or integrated into an instrument. Sustainers under the current disclosure can include an approaching or direction detector that detects movement of a resonant element towards or away from the sustainer. Depending on the movement a signal can be fed to an output actuator that creates a magnetic field to sustain or otherwise interact with the resonance of the element.

Abstract: The electric guitar contains at least one pickup in a recess on the guitar body. This pickup can be installed in a mounting frame and has electrical contact points which lead via a cable to the output port on the guitar body. The pickup has a fixing plate on its rear side, which is screwed onto the height adjuster of the pickup via a threaded bush at a variable distance from the base plate of the pickup. It contains spring-loaded pins which are electrically connected to the coils of the pickup. The fixing plate can be inserted without tools from the rear of the guitar body into a recess in the pickup frame and removed again from the pickup frame without tools. When the pickup is inserted, the pins on the fixing plate are connected to the electrical contact points on the mounting frame and the fixing plate is held in place on the mounting frame by means of permanent magnets.

Abstract: A process for making a variable wind guitar pickup and a variable wind guitar pickup made by the process is provided. The pickup is capable of many sounds by changing the number of windings using a selector switch such as a five-position or six-position selector switch.

Abstract: Disclosed are systems, methods, and non-transitory computer-readable storage media for scrolling a virtual keyboard on a touch screen device including a display. A first aspect allows detecting a user contact swipe motion in a predetermined direction along said keyboard, scrolling said keyboard across said display in accordance with said motion, and stopping said scrolling upon termination of user contact swipe motion. A second aspect allows scrolling of a virtual keyboard to snap to an intelligent position based on a song key or relative minor of the song key. A third aspect allows a note to be held when a user's finger remains in contact with the display even though the finger is no longer in contact with a key linked to the note on the keyboard as a result of scrolling.