It seemed he had an innate sense of how their posture should be and
whether the minute they opened their mouths their tongue or hard palate was in the right position.
As the professor made adjustments and the students sang again the differences were remarkable.
The tough part is for these students is to lock the memory of the right positions so when they sing the right physical positions will automatically lock into place.
"This is how operatic singing must be,'' Professor Ulloa said.
As he explained the finer techniques he also demonstrated through miming.
His students on Friday night were comfortable as the manner of this master is kind, sensitive and very sympathetic.
As NZ Opera School chairman and founder Donald Trott said Professor Ulloa was kindness itself. "He is a warm and caring man and his students can count themselves very lucky indeed.''