@conference{usher2006design, title = {Design Criteria for High Quality Upmixers}, author = {Usher, John}, booktitle = {Audio Engineering Society Conference: 28th International Conference: The Future of Audio Technology--Surround and Beyond}, month = {Jun}, year = {2006}, url = {https://www.aes.org/e-lib/browse.cfm?elib=13848} }