One way to get simple and configurable audio is to have a matrix-mixer. Example: mix a 2-channel old movie to the correct center mono. Adhere to Academy rules, which is 3-channel mix. output channels input channels left right center left 0.5 right 0.5 center surr left surr right back left back lright LFE silence silence mix Example: an ordinary 2-channel stereo to 5.1 without any mixing. output channels input channels left right center surr left surr right LFE left 1 right 1 center surr left surr right back left back lright LFE mix mix silence silence silence silence It might be good to grey out or not draw the input channels that are not available. With this it can also be possible to do matrix-decoding from 2-channel sources. /Adam Klotblixt