I think I have solved the crackling
I restarted Realband and it asked if I wanted factory reset, which I did. When it asked for the audio driver I increased the latency to 10ms, and it worked. I had tried to change it before in Realband, which was not correct, only on the asio control panel, duh.
I don't know why it hung up though, but as long as I am not changing things it seems to work.


Chris