In a previous post, Merkouris in Greece showed us how he decoded an MFSK32 image from the second audio harmonic …

http://voaradiogram.net/post/160838081557/decoding-mfsk-images-from-audio-harmonics-just

Now Roger in Germany has fooled Mother Nature to an even greater extent by decoding from the third audio harmonic of The Mighty KBC’s signal on 9400 kHz (via Bulgaria)…

http://www.rhci-online.net/radiogram/VoA_Radiogram_2017-05-20.htm#KBC