From : http://www.earlevel.com/main/2003/02/28/biquads/     One of the most-used filter forms is the biquad. A biquad is a second order (two poles and two zeros) IIR filter. It is high enough order to be useful on its own, and-because of coefficient…

Libfilth使用说明 winshton 2009年2月 (*本文大部分翻译自libfilth,还有一部分是个人使用实践 *时间水平均有限,翻译的不完整,尤其第二章可以忽略) 版本历史修改记录 版本 作者 日期 备注 V1.0 winshton 2009-2-1 创建               目 录 版本历史修改记录    1 1. 概述    5 2. 库文件分析    5 2.1. filth.h/filth.c    6 2.1.1. quantize()    6 2.1.2. f…

Direct Form 1 The most straightforward implementation is the Direct Form 1, which has the following difference equation: or, if normalized: Here the , and coefficients determine zeros, and , determine the position of the poles. Flow graph of biquad f…