This article explores the ways specific hardware and software technologies influence the design of musical instruments. We present the outcomes of a compositional game in which music technologists created simple instruments using common sensors and the Pure Data programming language. We identify a clustering of stylistic approaches and design patterns, and we discuss these findings in light of the interactions suggested by the materials provided, as well as makers' technomusical backgrounds. We propose that the design of digital instruments entails a situated negotiation between designer and tools, wherein musicians react to suggestions offered by technology based on their previous experience. Likewise, digital tools themselves may have been designed through a similar situated negotiation, producing a recursive process through which musical values are transferred from the workbench to the instrument. Instead of searching for ostensibly neutral and all-powerful technologies, we might instead embrace and even emphasize the embedded values of our tools, acknowledging their influence on the design of new musical artifacts.

The keyboard is one of the most popular and enduring musical interfaces ever created. Today, the keyboard is most closely associated with the acoustic piano and the electronic keyboards inspired by it, which share the essential feature of being discrete: Notes are defined temporally by their onset and release only, with little control over each note beyond velocity and timing. Many keyboard instruments have been invented, however, that let the player continuously shape each note. This article provides a review of keyboards whose keys allow continuous control, from early mechanical origins to the latest digital controllers and augmented instruments. Two of the author’s own contributions will be described in detail: a portable optical scanner that can measure continuous key angle on any acoustic piano, and the TouchKeys capacitive multi-touch sensors, which measure the position of fingers on the key surfaces. These two instrument technologies share the trait that they transform the keys of existing keyboards into fully continuous controllers. In addition to their ability to shape the sound of a sustaining note, both technologies also give the keyboardist new dimensions of articulation beyond key velocity. Even in an era of new and imaginative musical interfaces, the keyboard is likely to remain with us for the foreseeable future, and the incorporation of continuous control can bring new levels of richness and nuance to a performance.