As a ham radio operator using various audio filters for noise reduction in two way communications, any visual display helps. The K8098 works well for displaying the range of frequencies for Hi-Fi but is not easy to pick out offending noises in the normal communications bandwidth of 300-3000 Hz. If the controller could be reprogrammed to limit the audio range say 200-4000 Hz. this would make it very desirable for hams. Maybe the kit could be marketed as HIFI or Communication bandwidth with the spectrum scaled to the selected bandwidth.