Place it where sigma or gyaat is already mentioned in the edit, so the cut-off line follows those words directly. No pairing sound is documented in the supplied facts, so no other sound is recommended here for the same edit.
Об этом звуке
This 11-second voice clip features a speaker starting the line about wanting to be a sigma, cut off at sigm-, under the title Sticking at Ur Gyaat. The supplied facts give the duration and the gyaat search term, and no other context for the recording. Its origin is undocumented in the supplied facts, so no source work is named here.