@article {berdahl2012feedback, title = {Feedback control of acoustic musical instruments: Collocated control using physical analogs}, journal = {The Journal of the Acoustical Society of America}, volume = {131}, year = {2012}, note = {\ }, pages = {963}, abstract = {\ }, author = {Berdahl, E. and Smith III, J.O. and Niemeyer, G.} }