Hi,yes it is Asio ,and yes it is a delay ,when i click on the slider ,i can move it ,and the sound will go up or down,but when i let go of the slider all the tracks fall silent for a good second ,which begins to get your nerves a bit after a while lol ,sounds like i am moaning lol but i really like RealBand compared to others i have used ,thanks for your reply ,best wishes Brian.