Deepest Bass in the Known Universe...

My calulatons are as follows:
B flat below middle C: 233.082 Hz
B flat 57 octaves < C:1.6173312689105046047188807278e-15
Wavelength in feet: 672,383,587,026,397,394.72041599093881
Wavelength in lightyears: 21.66297
Speed of sound at?: 1087.467 Ft/Sec *
*speed of sound through a medium in this case gas depends on the state of the gas and the temperature of the gas.
square root of ratio of specific heat times the gas constant times the absolute temperature.
How many molecules of gas is out there?

Clueless
By working the other way from 10 million years to find the frequency I ended up with
456.98626355865002536783358701167 Hz between A and B flat
above middle C
They need to get in tune.

Rich