In more familiar transcriptional practice, his [u] appears to be a semihigh BACK rounded [??], and his [u] a semi-high CENTRAL rounded [??].
There is thus every indication that this is the semihigh central UNROUNDED counterpart of [??], namely [??].(11)
In this analysis, I have tried to provide a uniform and systematic account of the phonetic modifications undergone by the Pasiego vowels /i e a o u/ when they appear in the same domain as final /u/, which was determined to be the semihigh central rounded vowel [??] phonetically.