Archiving and Preserving Sound Files for Fifty Years Hence, Hundred

["losangelesprofessor" losangelesprofessor]

How do you archive and preserve sound files? Calibrate for the long term?

Mine are .wav files. I save them on DVDs or CDs as .wav files. I
figure that in 50 years, such LPCM files should still be readable. Is
this true? (Now vinyl or even shellac had the advantage that all they
demand is something that could discern the "bumps", but of course such
records could literally break.) I also store the files, elsewhere, on
an external hard drive.

Does anyone know what the Library of Congress does?

The second problem is calibration for sound levels. I can indicate
-20dB FS =3D 96 dB SPL. I could also record a 1000 cycle tone at a
particular dB SPL and tell people that their system should reproduce
it at say 84dB.

What do you do?

Thanks to all.

Martin Krieger