M.Mus. Faculty of Humanities, University of the Witwatersrand, 2008 / The broad structure of this reflexive essay is twofold: First I discuss my experience of making a compact disc (CD) recording with the Trio Hemanay, which consists of three performer-musicians – Marian Lewin (cello), Helen Vosloo (flute) and myself, Malcolm Nay (piano), and second I offer an analysis of Hendrik Hofmeyr’s Notturno Elegiaco for Piano Trio, a work composed specifically for the Trio Hemanay,. I draw on writings of other performers and recording artists, who have contemplated and engaged with the recording process, in order to place myself, the Trio and our music-making within a South African context. I further contextualise the Trio with reference to other well-known performing ensembles in South Africa. I refer to the inception and constitution of the Hemanay Trio and give some insights into aspects that inform the aesthetics and rationale of its establishment and existence. I also discuss the practicalities of financing and producing such a recording, and the extent to which non-musical issues inevitably impact on the artistic outcome. I further elaborate on the value of documenting music through recordings, both from a personal and from an objective perspective, and I reflect on what I have learnt from the recording experience; where relevant, I collate this with the experience of my two colleagues. In Part II, I offer an analysis of the musical content and a stylistic scrutiny of Hendrik Hofmeyr’s Notturno Elegiaco, recorded by Trio Hemanay on the CD under discussion (the only current recording of this work). This essay is written in a narrative form, which allows me to discuss the inception of the recording, the development of the process and the elements that have contributed to the acquisition of greater insights for both me and for the Trio, all of which may influence future projects.

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No description available.

International Telemetering Conference Proceedings / October 28-31, 1985 / Riviera Hotel, Las Vegas, Nevada / A novel source of noise is identified and described in this study. If a continuous recording medium is less than perfectly uniform, a given quantity may be recorded differently at different locations in the medium. Inadvertent “encoding” occurs, embedding noise in the signal. Symmetrical sideband noise power results from amplitude and phase modulation of the signal stream by the nonuniform recording medium. “Write noise”, so-called because writing is required, is correlated in amplitude with signal amplitude, and its mean frequency is the signal frequency. It is the dominant noise source for the current generation of recorders and tapes; its power spectrum is almost the same as the power spectrum of the signal. The ratio of standard deviation to mean value of the signal envelope when recording cw signals is an absolute measure of tape quality independent of record level, tape speed, and track width, and establishes an available signal-to-noise ratio which cannot be exceeded. It is assumed that the recorder output has a normal amplitude distribution about its mean value. Theory is confirmed by experiment, within experimental error, for cw and digital recording.

International Telemetering Conference Proceedings / October 30-November 02, 1989 / Town & Country Hotel & Convention Center, San Diego, California / In order to satisfy future instrumentation data recording requirements, the availability of high data rate recorders with long record times is most desirable. Also, assurance of commonality amongst the many users of these data requires that any system designed be compatible across the user data base. Hence, the American National Standards Institute (ANSI) has developed a tape format standard that will assure commonality and exchange of data in an acceptable manner. This standard also establishes data rate recording requirements using a commercially available media in cassette form that will satisfy the operational need. DATATAPE is developing a recorder system that will meet the ANSI requirements of the data format on tape, as well as the data rate and record times implied by the standard. This paper discusses the development of the tape format standard and the design of the system that will fully comply with the standard. Test data will be presented to verify system capabilities. Additionally, DATATAPE's progress in developing a system that will comply with the similar Department of Defense (DOD) tape format Standard, MIL-STD- 2179, will be presented, along with a summary of DOD programs that require MIL-STD-2179 compliant recorder systems.

International Telemetering Conference Proceedings / October 30-November 02, 1989 / Town & Country Hotel & Convention Center, San Diego, California / In order to satisfy future instrumentation data recording requirements, the availability of high data rate recorders with long record times is most desirable. Also, assurance of commonality amongst the many users of these data requires that any system designed be compatible across the user data base. Hence, the American National Standards Institute (ANSI) has developed a tape format standard that will assure commonality and exchange of data in an acceptable manner. This standard also establishes data rate recording requirements using a commercially available media in cassette form that will satisfy the operational need. DATATAPE is developing a recorder system that will meet the ANSI requirements of the data format on tape, as well as the data rate and record times implied by the standard. This paper discusses the development of the tape format standard and the design of the system that will fully comply with the standard. Test data will be presented to verify system capabilities. Additionally, DATATAPE’s progress in developing a system that will comply with the similar Department of Defense (DOD) tape format Standard, MIL-STD2179, will be presented, along with a summary of DOD programs that require MIL-STD-2179 compliant recorder systems.

Inaug.-Diss.--Cologne. / Vita. Bibliography: p. iii-ix.

International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California / Modern telemetry systems collect large quantities of data at high rates of speed. To support near real-time analysis of this data, a sophisticated data archival system is required. If the data is to be analyzed during the test, it must be available via computer-accessible peripheral devices. The use of computer-compatible media permits powerful “instant- replay-type” functions to be implemented, allowing the user to search for events, blow-up time segments, or alter playback rates. Using computer-compatible media also implies inexpensive COTS devices with an “industry standard” interface and direct media compatibility with host processing systems. This paper discusses the design and implementation of a board-level archive subsystem developed by Veda Systems, Incorporated.

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No description available.