DIRECT 1.0 TYPE Library version 1.0 is the ActiveX class. In LabVIEW, drop an automation refnum on the front panel, right click on it, choose Select ActiveX class, and Browse for it. Once found, you can choose the DirectSound object. You can then use LabVIEW's Invoke Node or Property Node functions to access methods and properties. How you use the properties and methods is really outside the scope of this forum. You'll probably have to search Microsoft's web site for DirectX documentation and/or find a DirectX book.