Discrimination names always show up as "BAD_FILENAME"

[nohelix]

This was a known issue at the time of code development as its hard to tell the zoom in files from the discrimination files.

However, now that I can calculate the octave steps (octave_step = log(go_kHz/nogo_kHz)/log(2)) we can tell if its on the 1/6 or the 1/12 which allows me to determine the name. Thus, I need to re-work the Octave file name generator.