JD Sumner EXTREMELY low notes (chest Bb0 and G#0 (read description)) from last Elvis FTD release

Here are 6 slides that JD Sumner did on May 19, 20 and 25 1974 where he hits among his lowest chest note ever recorded.

After re-analysing the A0, I've found at the very lowest frequency, 25.97Hz so a G#0. JD hit a G#0 chest that's totally crazy. That's 1 semitone below the piano.
These recordings are in a very good quality.

The 3rd divebomb is for me the craziest one, 30 seconds in one breath hitting multiple great chest Bb0s.
For your information, low notes require a lot more air than "normal" notes, adding that JD was a heavy smoker, what he did in the slide is close to impossible.

Credit goes to Javi TCB who had the kindness to post these concerts on youtube

Concert links :
from May 19, 1974 :    • Stateline Sahara 1974 | May 19, 1974 ...  

from May 20, 1974 :    • Stateline Sahara 1974 Vol. 2 | May 20...  

from May 25, 1974 :    • Stateline Sahara 1974 Vol. 3 | May 25...