Audio Troubleshooting Guide Now Available to Access Grid Operators

COLUMBUS, Ohio (May 7, 2003) — 

Imagine being a node operator for an Access Grid event when the presenter's voice echoes. What should you do? Could the microphone be too close to the audio speaker? Learn about troubleshooting Access Grid audio with assistance from the latest in a series of online tutorials for the Access Grid.

Boston University, the National Center for Supercomputing Applications (NCSA), and OSC are pleased to announce the availability of "Access Grid Audio Troubleshooting: A Guide for Technical Users" on the NCSA WebCT server at This tutorial and a number of other AG-related tutorials can be found by selecting Access Grid Tutorials.

This tutorial identifies and provides solutions for potential audio problems that may be encountered during an Access Grid event. The tutorial is complete with audio files, so you have an opportunity to hear troublesome noises. For instance, there are sample audio clips that illustrate echo, and garbled and distorted audio. With each sample audio clip, troubleshooting techniques are described.

"Very Timely! This has been very helpful in guiding our partner institutions of the Louisiana Biomedical Research Infrastructure Networks (LBRN) to assemble their Access Grid nodes,” said John I. Quebedeaux Jr., Computer Manager, Louisiana State University Biological Sciences. "When completed, we'll have five nodes across the state of Louisiana, two in Baton Rouge, two in New Orleans, and one in Monroe."
This tutorial is presented by the Access Grid Training Project, formerly known as the Access Grid-in-a-Box Tutorials Group.

This activity is sponsored in part by the Alliance Partners for Computational Services.

About Boston University
Boston University, through the Center for Computational Science and the Scientific Computing and Visualization Group, is a regional leader in applications of parallel supercomputing, visualization, and networking. As a partner of the National Science Foundation (NSF) sponsored National Computational Science Alliance, the university's roles include working with other partners to develop technologies needed to build an advanced distributed computing environment, coordinating education and outreach activities for the Alliance, as well as establishing MARINER, a regional center of high performance computing resources under the Alliance Partners for Advanced Computational Service. The university's scientific computing facilities include a cluster of IBM pSeries 690 Regatta supercomputers, an IBM SP, an SGI Origin2000 cluster, a Linux cluster, an Access Grid Conference Facility and a computer graphics laboratory, featuring an Immersadesk and the university-built high-resolution, passive-stereo Deep Vision Display Wall. For more information, see and

About NCSA
The National Center for Supercomputing Applications (NCSA) at the University of Illinois at Urbana-Champaign is a leader in developing and deploying cutting-edge high performance computing, networking, and information technologies. NCSA is a partner in the TeraGrid project, a National Science Foundation initiative to build and deploy the world's largest, fastest, most comprehensive distributed infrastructure for open scientific research. NCSA also leads the National Computational Science Alliance (Alliance), a partnership to prototype an advanced computational infrastructure for the 21st century that includes more than 50 academic, government, and industry research partners. The NSF Partnerships for Advanced Computational Infrastructure (PACI) program funds the Alliance. In addition to the NSF, NCSA receives support from the state of Illinois, the University of Illinois, private sector partners, and other federal agencies. For more information, see

About OSC
OSC (Ohio Supercomputer Center) is Ohio's high performance computing and networking center. The Center provides scientific computing, networking, educational outreach, and information technology resources to state and national high performance computing and networking groups. OSC empowers its academic, industrial, and government partners to make Ohio the education and technology state of the future. For more information, go to