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Gesture-Based interfaces offer an alternative to traditional keyboard, menu, and direct manipulation interfaces. The ability to specify objects, an operation, and additional parameters with a single intuitive gesture appeals to both novice and experienced users. Unfortunately, gesture-based interfaces have not been extensively researched, partly because(More)
A gesture-based interface is one in which the user specifies commands by simple drawings, typically made with a mouse or stylus. A single intuitive gesture can simultaneously specify objects, an operation, and additional parameters, making gestures more powerful than the "clicks" and "drags" of traditional direct-manipulation interfaces. However, a problem(More)
Tactus addresses problems of synchronizing and controlling various interactive continuous-time media. The Tactus system consists of two main parts. The first is a server that synchronizes the presentation of multiple media, including audio, video, graphics, and MIDI at a workstation. The second is a set of extensions to a graphical user interface toolkit to(More)
Traditional software synthesis systems, such as Music V, utilize an instance model of computation in which each note instantiates a new copy of an instrument. An alternative is the resource model, exemplified by MIDI ''mono mode'', in which multiple updates can modify a sound continuously, and where multiple notes share a single instrument. We have(More)
Multimedia has generated widespread interest in real-time support within general purpose operating systems. Multimedia also places new demands on operating systems for interprocess communication. The Multimedia Testbed is a set of applications that stress consistent low-latency response and efficient interprocess communication for large blocks of data. The(More)