Professor Barry Quinn will be visiting the Audio Analysis Lab this fall as Guest Professor. He is Professor of Statistics, Dept. of Statistics, Macquarie University, Sydney, Australia. In the signal processing community, he is well-known for his fundamental work on autoregressive processes, frequency estimation and order estimation. While visiting Aalborg University, he will be working with the member of Audio Analysis Lab on our various research projects and will giving a Ph.D. course entitled The Estimation of Frequency. Course details can be found at https://phdcourses.dk/Course/54629.