We have a 24 channel analogue desk, and I want to ensure that all the sends and inputs work consistently and soak for a long time. I also have a few other boxes that I need to test, as we have an intermittent fault somewhere in our output signal chain, but it is too intermittent to do a listening test a.k.a. I don't have that much time. I thought about getting an interface and writing a bunch of test cases firing white noise in and checking that there is no band passing/dropouts on the outputs, but that is quite time consuming, although if it has to be done it'll have to be done. What is the generally accepted way of solving these issues?