[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index][Thread Index][Author Index]

**To**:**Loopers-Delight@loopers-delight.com****From**:**Bill Fox <billyfox@soundscapes.us>****Subject**:**Re: sample rate****Date**:**Sun, 25 Dec 2005 13:32:18 -0500**

Tom Combs wrote: > I thought the Nyquist theorem is all about reconstructing a signal > once sampled. A signal is not reconstructed by simply "connecting the > dots", it is reconstructed by passing it through a low pass filter. > If you pass a sawtooth, triangle, square, or any other variety of > periodic signal with frequency f through a low pass filter whose > passband is perfectly flat up until frequency f, and then perfectly 0 > beyond f, then what comes out is a pure sine wave of frequency f - > that's because squares, triangles and whatnot all contain harmonics in > addition to the pure sine wave that dictates its fundamental frequency. > > A signal sampled at twice the Nyquist frequency can be perfectly > reconstructed in a world of perfect filters and perfect sampling devices. Right on! Cheers, Bill

**References**:- Re: sample rate
*From:*Brian Cass <b@the0verclock.com>

- RE: sample rate
*From:*Warren Sirota <wsirota@wsdesigns.com>

- Re: sample rate
*From:*Tom Combs <tncombs@gmail.com>

- Re: sample rate

- Prev by Date: Re: sample rate
- Next by Date: Re: sample rate
- Previous by Thread: Re: sample rate
- Next by Thread: DSD (Re: sample rate)
- Index(es):