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seen Sep 8 '13 at 10:15

Mar
9
awarded  Popular Question
Sep
7
awarded  Editor
Sep
7
revised What is the meaning of “frequency of a human voice”?
Corrected the Question
Sep
6
asked What is the meaning of “frequency of a human voice”?
Jan
23
comment What information is stored on gramaphones/tape recorders/CDs/DVDs
..>>You can make an arbitrary sound (or any waveform) by adding together a bunch of pure tones at different frequencies << bang on! Liked this lucid explanation.
Jan
23
comment What information is stored on gramaphones/tape recorders/CDs/DVDs
@twistor..thanks for detailed explanation. I'll try to understand fourier transform (had a bit of it in my Engineering course)
Jan
22
awarded  Scholar
Jan
22
comment What information is stored on gramaphones/tape recorders/CDs/DVDs
@RedGrittyBrick..as I accept the answer I would like to ask you a closing question, Essentially a gramophone doesn't actually do any fourier transforms. All it records is the displacement of microphone at every instant of time and reproduces same using a diaphragm.
Jan
22
accepted What information is stored on gramaphones/tape recorders/CDs/DVDs
Jan
22
awarded  Supporter
Jan
22
comment What information is stored on gramaphones/tape recorders/CDs/DVDs
@RedGrittyBrick..thanks for the answer! The first part of the answer pretty much explains what I want. Is it like at every point in time (say at every ms) we record all the harmonics that contribute to the sound wave at that instant of time? Also, I can understand that recording this information in a digital form is easy. How is stored on mechanical device like Gramophone? Do we just record grooves with varying depths over time?
Jan
10
awarded  Student
Jan
10
asked What information is stored on gramaphones/tape recorders/CDs/DVDs