I found my AB (cream/white variety) scents in the morning and is more fragrant days after I had it outside. (Not something I would recommend at this time of the year). With any orchid, gradual increased exposure to light is always suggested. I found that with indoor lighting, it would scent until around noon .. and when brought it in from outside ..it would scent into the early evening.
That is the yellowest AB I have ever seen
.. most yellows I have seen were pale in color
What it lacks in scent, it makes up in color intensity.