This document describes a dataset designed to investigate vowel quality and ATR in Shilluk. The primary data are sound files, digitally recorded at 48kHz using a Marantz PMD 660 recorder and a Shure SM10A microphone. The recordings were made in December 2008 and January 2009, with nine native speakers of Shilluk (three women, six men) who resided in Khartoum, the capital of Sudan. It includes 1105 files - 562 wav files and 543 Praat TextGrid files. See DescriptionOfTheDataset.pdf for a detailed description. See DescriptionOfTheDataset.pdf