Hi there,
As a singer, a few things have bothered me over the years, and despite checking out a lot of forums and resources, I have failed to get a satisfactory answer.
The first one is that when I do my morning vocal practice I'm able to hit low notes, but as the day progresses I lose that bass, and by evening I am rarely able to hit the same notes. I lose a note or two. This is despite years of sustained practice. There are times when it's better than other times, but I noticed this frequently.
The second thing is if I ever take an afternoon nap and wake up, my voice is never able to open up for the rest of the day on the higher register, even if I was able to hit those notes in the morning.
Would appreciate any guidance / response.