12 Aug
2004
12 Aug
'04
9:03 a.m.
No it is sampling rate here that is the problem for
10,000 Hz. This
signal gets chopped into a sine or square or triangle wave. Ok for
telephone but not music.
That's a matter for reconstruction filters. Ideally, you take your
D->A output and run it through a filter that's flat from DC to the
limit frequency (half the sampling rate) and drops instantly to zero
gain for anything above that.
Of course, no such ideal filter exists, but it's possible to get close
enough for a lot of purposes. CD player makers put a lot of effort
into approximating such filters.
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