After some testing, I got this Surprise (WinXP): Sonar + (Layla24 or Delta1010) with GigaStudio: Using the Delta1010 with Sonar and GigaStudio, all outputs (1,2 3,4 5,6 7,8) can be used by both programs (ASIO). Using the Layla24 with Sonar and GigaStudio, any output used by GigaStudio (1,2 3,4 5,6 7,8) cannot be used by Sonar (ASIO or WMD)! If you need to share audio outputs, get a Delta1010.