Gamma: A C++ Sound Synthesis Library Further Abstracting the Unit Generator

(Abstract to follow

A Method of Timbre-Shape Synthesis Based On Summation of Spherical Curves

It is well-known that there is a rich correspondence between sound and visual curves, perhaps most widely explored through direct input of sound into an oscilloscope. However, there have been relatively few proposals on how to translate sound into three-dimensional curves. We present a novel method for simultaneous production of sonic tones and graphical curves based on additive synthesis of spherical curves. The spherical curves are generated from a sequence of elemental 3D rotations, similar to a Euler rotation. We show that this method can produce many important two- and three-dimensional curves directly from sine waves and thus provide a basic language for exploring timbre-shape relationships

Echo Shaping Using Sums of Damped Complex Sinusoids

Feedback delay lines are the basis of myriad audio effects and reverberation schemes. The feedback delay line, by itself, is limited to producing an infinite sequence of exponentially decaying echoes. We introduce a new type of linear time-invariant echo effect whose impulse response is a generalized sum of damped complex sinusoids. This permits echo responses to be shaped as simple sinusoids, Fourier-based waveforms, and many other complex, possibly nonperiodic, patterns that would not be feasible with other existing methods. Additionally, because the response is complex-valued, it can be used to produce auto-panning echo effects with many kinds of spatial trajectories. The effect is computationally efficient and straightforward to implement, as it only requires a parallel combination of feedback delay lines. </jats:p

Studies in Composing Hydrogen Atom Wavefunctions

We present our studies in composing elementary wavefunctions of a hydrogen-like atom and identify several relationships between physical phenomena and musical composition that helped guide the process. The hydrogen-like atom accurately describes some of the fundamental quantum mechanical phenomena of nature and supplies the composer with a set of well-defined mathematical constraints that can create a wide variety of complex spatiotemporal patterns. We explore the visual appearance of time-dependent combinations of two and three eigenfunctions of an electron with spin in a hydrogen-like atom, highlighting the resulting symmetries and symmetry changes

Dynamic Interactivity Inside the AlloSphere

We present the Device Server, a framework and applica-tion driving interaction in the AlloSphere virtual reality environment. The motivation and development of the De-vice Server stems from the practical concerns of managing multi-user interactivity with a variety of physical devices for disparate performance and virtual reality environments housed in the same physical location. The interface of the Device Server allows users to see how devices are assigned to application functionalities, al-ter these assignments and save them into configuration files for later use. Configurations defining how applications use devices can be changed on the fly without recompiling or relaunching applications. Multiple applications can be con-nected to the Device Server concurrently. The Device Server provides several conveniences for per-formance environments. It can process control data ef-ficiently using Just-In-Time compiled Lua expressions; in doing so it frees processing cycles on audio and video ren-dering computers. All control signals entering the Device Server can be recorded, saved, and played back allowing performances based on control data to be recreated in their entirety. The Device Server attempts to homogenize the ap-pearance of different control signals to applications so that users can assign any interface element they choose to appli-cation functionalities and easily experiment with different control configurations

Towards a General-purpose Infrastructure for Novel Collaborative Multimodal Human-Computer Interfaces

We describe our investigations towards creating a multi-user audiovisual painting canvas and its role in developing a more general-purpose infrastructure for multi-user orchestration of complex spatiotemporal patterns. The infrastructure consists of a device server for orchestrating multiple input controllers that send messages to a virtual interaction space. 1