Help me please

:sad:HI Why don’t standard audio CDs need to reproduce sounds with frequencies above about 22KHz? What change in the format would we have to make to reproduce sounds up to 30KHz?

thank you :sad::sad::sad::sad::sad:

Oy! again with the ‘help me please’! http://en.wikipedia.org/wiki/Audiograms_in_mammals. 22KHz is beyond what we can hear. FWIW http://en.wikipedia.org/wiki/Nyquist-Shannon_sampling_theorem has it that you need to sample at at least twice the highest frequency you’re trying to capture.