You have to use the DDC file, then with the wavetxt application produce the required separate file with all the meta-data inside.
If you playback the file without this text file, then only "relative" frequencies are displayed.
Some wideband recordings have a different file format, just open it with Audacity and store it again and it should work with go2MONITOR. Also other tools like SOX can do the job.
if you have a 24 bit integer file, you can convert it to 32bit float with:
sox -b 24 input.wav -e floating-point output.wav
If you don't know your file format, you can try to analyze with:
sox --i filename
Last update on 2019-03-14 by Rolf Haenggi.