Current scientific knowledge on the acoustics of woodwind instruments allows accurate physical modeling of the sound generation mechanisms, and the acoustic interaction with the air column. These physical models can be incorporated into computer software, in order to evaluate not only the tuning, voicing, and other tonal characteristics of existing instrument designs, but also to estimate the potential effects of proposed modifications, and to anticipate the characteristics of new designs. This presentation describes the development of an interactive computer program for the acoustic design, evaluation, and auralization of woodwind musical instruments. The program displays a graphical user interface that allows convenient entry of air column data, including constant and variable cross-section segments, open and closed fingerholes, and air column terminations. It also implements different types of sound excitation mechanisms, which include jet-driven (flutelike) and single reed (clarinetlike) models. The program can produce input impedance and reflection function data for further acoustic analysis, and synthetic sounds that approximate the musical tones that can be expected form the actual instrument. The software has been validated by comparative analysis of calculated versus measured air columns, and simulated versus actual (recorded) flute tones.