Hi Hillman
I am beginning to to understand then the Labview soundsystem behave strange and what it is that trigger it. It happens then the the sound input system are used with updates rates around 10 times per second or lower. And the behavior is somewhat puzzling. I am working to get the full picture and my summer vacation is about to start. So it will take some time for me to get back to you and this problem. Meanwhile is it some public NI place where I can read about reported problems with the NI sound system
Besides which, my opinion is that Express VIs Carthage must be destroyed deleted
(Sorry no Labview "brag list" so far)