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Digital Filter Tutorial at National Instruments
A filter that is built by converting the analog signals to digital values, and then implementing the filter using digital circuits, such as delay lines, accumulators, and feedback elements. Digital filtering involves the inherent inter-linking between modulation and signal filtering. Whether you are in the analog or digital domain, most often modulation operations will not properly function if they are not (usually) preceded, combined...
preview: http://zone.ni.com   |

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Digital Filters: An Introduction
This tutorial is a good, in-depth, yet easy to understand, explanation of digital filters. It includes digital filters' advantages, types, parameters, and it also has examples of simple filters. The site is HTML and the tutorial is also available as a PDF file.
preview: http://www.dsptutor.freeuk.com   |

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Digital-Signal-Processing Filters (DSP)
By utilizing DSP’s capable of sequencing and reproducing hundreds to thousands of discrete elements, design models can simulate large hardware structures at relatively low cost. DSP techniques can perform functions such as Fast-Fourier Transforms (FFT), delay equalization, programmable gain, modulation, encoding/decoding, and filtering.
preview: http://www.freqdev.com   |

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Filters, Delays, Modulations and Demodulations
A set of basic signal processing building blocks is presented and the implementation issues, that are relevant to musical applications, are underlined. in this text a filter classification is first outlined then implementation schemes for analog and digital lowpass-filters, within the canonical and the state-variable structure, are given. As well as higher order filters according to the Butterworth design are suggested, delay-based effects...
preview: http://on1.zkm.de   date: 1/1/1999 |

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