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Re:Linkwitz transform 11 years 2 months ago #2669

  • flocchini47
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Albert

I actually have

biquad1,
a0=1,
a1=1.995203563661810,
a2=-0.995211837027711,
b0=1.002767239860590,
b1=-1.995188529985050,
b2=0.992459630843881,
biquad2,
a0=1,
a1=1.995203563661810,
a2=-0.995211837027711,
b0=1.002767239860590,
b1=-1.995188529985050,
b2=0.992459630843881,

to biquad8 ( I end without a comma.

I do this in the output section

Thanks

Bob

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Re:Linkwitz transform 11 years 2 months ago #2677

  • devteam
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Bob,

Your formatting is indeed incorrect.. See the help/front page of the plug-in (REW input format button) or user manual for more info, but basically the plug-in expects something like this:

biquad1,
b0=1.00255060195923,
b1=-1.99872541427612,
b2=0.996345996856689,
a1=1.99872541427612,
a2=-0.998896598815918,
biquad2,
b0=1.02530908584595,
b1=-1.97203516960144,
b2=0.963742733001709,
a1=1.97203516960144,
a2=-0.989051818847656,
...

FYI, using the spreadsheet from this forum there is a section in yellow that should say "paste to miniDSP plug-in". That's what you'd need to paste (i..e in the correct order and without the a0.

Hope this helps,

DevTeam
miniDSP, building a DSP community one board at a time.

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Last edit: by devteam.

Re:Linkwitz transform 11 years 2 months ago #2688

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Thanks

I will do this.

Do I paste at the input or the output? Sorry for being dense.

Best

Bob

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Re:Linkwitz transform 11 years 2 months ago #2690

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Thanks for all the help = Up and running

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Re:Linkwitz transform 10 years 10 months ago #3644

  • CharlieLaub
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knuisje,

Thanks so much for posting your spreadsheet (in post #1118 ) that can calculate the MiniDSP Z-transform transfer function coefficients. I had developed a very complicated crossover using the Laplace Domain transfer functions, but obviously could not enter those coefficients... I would have been stuck... so thanks again!!!

One request, however, as you are missing two important filter functions: the FIRST order shelving high and low pass filters. Any chance that you could add these to the spreadsheet???

-Charlie

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Last edit: by CharlieLaub.

Re:Linkwitz transform 10 years 10 months ago #3655

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Charlie,

Those first-order filters can be programmed without using the advanced biquad capability. Just select a normal high/low-shelf and Q=1.

Cheers,

Dave.

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