Sorry, half language, half music question
In this Bağlama video the author seems to refer to a note by name "ES". Here is the transcript taken from a comment by author:
<!-- language-all: lang-none --> ES Mİ Mİ FA Mİ Mİ DO - RE RE RE Mİ RE Mİ ES Mİ Mİ FA Mİ Mİ DO - RE RE RE Mİ RE Mİ ES Mİ Mİ FA Mİ Mİ DO - RE RE RE Mİ RE Mİ ES DO RE RE RE Sİ - DO DO Sİ RE DO RE ES DO Sİ RE DO DO Sİ - Sİ Sİ Sİ DO Sİ DO ES Sİ LA DO Sİ Sİ LA LA
By exclusion it seems that SOL is missing, but to my sense of pitch it sounds more like the same note that the author calls "Mİ".
Looking at the orthography, I assume that might all be in Turkish so I looked up note names on the Turkish wiki but I did not notice any note named like that.
So what could it be? Maybe it is something like "root" or "bass"?