Rajko Sefterski, Bulgarian scientist who published the inscriptions on "Musical horn", believed that the script used to write it derived from Chinese characters . His argument was indirect: the testimony of Al Nadim in Fihrist. He never tried to compare Bulgarian glyphs with Chinese characters. This was done by Bulgarian cinologist, Gogova before even those inscriptions had been published. Unfortunately, only a short preview of her work was shown to public. One can ask himself, if is it possible a writing system similar to Chinese to be used unnoticed in Middle Ages Europe. On other hand, Bulgarian signs look so different from Chinese. But are they really so different? Or they just underwent centuries long evolution. What about their ancient forms, Bronze vessel script and Oracle Bone script? First Bulgarian glyph that catches eyes, , looks exactly as Chinese hanzi 大 (dà- big). Also, an alograph of found at Great Basilica at Pliska resemble very first form of character 天 (tiān- sky,god). In fact, the very rare Glagolithic letter "ТЕ" have similar cross-like shape which synchronizes with the possible word for God in Bulgar language- "tengri".
Secondly, the glyph resemble character for 5 in Oracle bone script. Also, the Murfatlar letter looks like Chinese character 王 (wáng- chief). It looks that search for more similarities between Bulgarian glyphs and Chinese characters will give more results.
But BSS is not an isolated phenomenon among steppean writing systems. Orkhon script, an alphabet used to write Old Turkic, is also suspected to contain a group of signs that initially started as pictographs. uniform writing that it is wort examining another writing system that have traces of pictography among its inventory of signs, Orkhon script. Danish philologist Vilhelm Thomsen, who deciphered Orkhon script in 1893 suspected that letters r2, l2, t1, n2, g1 and š are pictographs. Latter, A. von Gabain and G. Clauson added to this list b2, k4 and y1. Finally, A. Rona Tas summed up all possible pictographs in his paper “On the Development and Origin of The East Turkic “Runic” Script:”
Some of those photographic signs look similar to gliphs of Bulgarian sacred script (BSS) : ,,, ,. The phonetic values of those characters are known, so together with Chinese characters they will be valuable source of understanding BSS.