I need a quick fix on how to very temporarily extend my lower voice range.
The note(s) I need to reach, for a short performance in a couple of days, are notes that I can reach fairly easily and sing reasonably strong during times when I'm actively singing in choirs (with 2-3 semitones to spare until my absolute range limit)1. However I'm currently out of shape and the desired note(s) - although I currently in general can "sing" them - are very weak and at the very limit of my lower range. That is I'm lacking the 2-3 semitones of "buffer" that would make for the desired note(s) to come out strong enough. Also, since the performance is in the evening I afraid of tensioning up during the day so I can't reach the notes at all.
Since (a) this is a one time thing, (b) the total performance time for me will be less than a minute, (c) my voice quality for the performance is pretty much irrelevant, and (d) I'm not dependent on my singing voice for a living, I am open to suggestions that are possibly (but hopefully temporarily) destructive for the voice. Such as Drinking special fluids? Or screaming? Or making the vocal chords swollen some (other) way?
I've read this (and others) Q&A, but it's not aimed at a temporary quick fix and don't allow for having a possible bad voice:
How to extend and strengthen low end of vocal range? (I need about a whole tone extra.)
When singing in a choir I normally sing bass 2.
Mornings after a good party I can reach up to a fifth lower than my current low end limit and the desired notes then come out at full strength.
1These notes are very rarely found in choir music, but the active singing makes my range encompass them for easy reach.