Wiki

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
resources:tools-software:sigmastudio:toolbox:filters:generaleq2ndorderslewext [09 Jan 2021 01:00] – user interwiki links Robin Getzresources:tools-software:sigmastudio:toolbox:filters:generaleq2ndorderslewext [11 Jul 2022 08:00] (current) – Based on source code ,information has changed ananthakalyani Sankar
Line 38: Line 38:
 -------------------------------------------------------------------------------- --------------------------------------------------------------------------------
  
-This block's algorithms use biquad filter designs ([[ez>message/16011#16011|Direct Form II]]) based on Robert Bristow-Johnson's work in this field.\\+This block's algorithms use biquad filter designs ([[ez>message/16011#16011|Direct Form I]]) based on Robert Bristow-Johnson's work in this field.\\
 \\ \\
 <m>H(z)={b_0 + b_1 z^-1 + b_2 z^-2}/{1 + a_1 z^-1 + a_2 z^-2}</m> <m>H(z)={b_0 + b_1 z^-1 + b_2 z^-2}/{1 + a_1 z^-1 + a_2 z^-2}</m>
Line 75: Line 75:
 The Q is shown with the value adjusted (from the classical EE definition) so that a boost of N dB followed by a cut of N dB for identical Q and f0/Fs results in a precisely flat unity gain filter or "wire". This is equal to A*Q, where A = 10^(dBgain/40). The Q is shown with the value adjusted (from the classical EE definition) so that a boost of N dB followed by a cut of N dB for identical Q and f0/Fs results in a precisely flat unity gain filter or "wire". This is equal to A*Q, where A = 10^(dBgain/40).
  
 +__**Note:**__ Some of the General 2nd order filters (those in the Type2 tree) are based on the Direct Form II implementation, which is used in the following HW ADSP-215xx & SC5xx.
 +Please see the image below.
  
  
- +{{Type2supportfor SHARCModules.png}}
  
resources/tools-software/sigmastudio/toolbox/filters/generaleq2ndorderslewext.txt · Last modified: 11 Jul 2022 08:00 by ananthakalyani Sankar