Welcome, Guest
Username: Password: Remember me
This is the optional Forum header for the Suggestion Box.

TOPIC:

Linkwitz transform 11 years 11 months ago #542

  • sladi
  • sladi's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 78
  • Thank you received: 8
That could be useful too I think.

Regards
Sladi

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 11 months ago #545

  • Christian
  • Christian's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 72
  • Thank you received: 3
I didn't try yet but is there anything preventing you to achieve it using the "low-shelf" filter type :dry:

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 11 months ago #546

  • sladi
  • sladi's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 78
  • Thank you received: 8
Neither did I, I have still no board. There are a lot of EQ filters available so I guess you could live without it. I don't know different it would be using the shelf filter. I just saw the Youtube video. :)

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 11 months ago #554

  • DFO
  • DFO's Avatar
  • Offline
  • Premium Member
  • Premium Member
  • Posts: 80
  • Thank you received: 1
It's possible to make a linkwitz transform with the different eq's in the plug-ins. It's not easy since you have to know som math. I'm not into the math, but I can at least link to the formulas.
www.linkwitzlab.com/filters.htm#9


and a relevant thread on diyaudio
www.diyaudio.com/forums/digital-line-lev...kwitz-transform.html

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 11 months ago #555

  • sladi
  • sladi's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 78
  • Thank you received: 8
Nice, thank you. I forgot about the shelving filters. :blush:

Please Log in or Create an account to join the conversation.

Last edit: by sladi.

Re:Linkwitz transform 11 years 11 months ago #561

  • devteam
  • devteam's Avatar
  • Away
  • Administrator
  • Administrator
  • Posts: 9049
  • Thank you received: 1376
As mentioned by Brian, I indeed think that you should be able to get something real close to it with playing with the current filters. The links provided should get you started.
miniDSP, building a DSP community one board at a time.

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 9 months ago #880

  • Juoigâ
  • Juoigâ's Avatar
  • Offline
  • Elite Member
  • Elite Member
  • Posts: 257
  • Thank you received: 50
the biquads in the "advanced" plug-in should enable this. (I have not worked with this one yet, so maybe the dev team could explain more)

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 9 months ago #885

  • devteam
  • devteam's Avatar
  • Away
  • Administrator
  • Administrator
  • Posts: 9049
  • Thank you received: 1376
Indeed the Biquad in Advance mode gives you everything you need to build a Linkwitz transform... We're swamped for the next few days as we're trying to release a new set of plug-ins and working on deadline, so it's not going to happen now I'm afraid...

It's not that complex to figure out the biquad coeff though... Building a spreadsheet with the formula just requires a bit of work..
miniDSP, building a DSP community one board at a time.

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 9 months ago #900

  • knuisje
  • knuisje's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 48
  • Thank you received: 4
I made a spreadsheet to calculate the needed digital coefficients for the MiniDSP biquad eq.

Attachment LT_digital_coefs.zip not found

Attachments:
The following user(s) said Thank You: Fenalaar

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 9 months ago #902

  • devteam
  • devteam's Avatar
  • Away
  • Administrator
  • Administrator
  • Posts: 9049
  • Thank you received: 1376
That's what I would call great ommunity spirit! Neat Stuff and once again Thanks for your participation..

miniDSP members, whoever finds this simple spreadsheet useful, please give Knuisje a Karma point! :-)

Actually, this apply to anywhere on this forum... If you find valuable information from a thread or one of the community members, just click on the Thumb UP button next to the post to reward the great members that make this community happen.

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

Please Log in or Create an account to join the conversation.

Last edit: by devteam.

Re:Linkwitz transform 11 years 9 months ago #903

  • sladi
  • sladi's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 78
  • Thank you received: 8
Thank you very much! It works fine in Openoffice too. Now I just have to finish my speaker. :)

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 9 months ago #904

  • Juoigâ
  • Juoigâ's Avatar
  • Offline
  • Elite Member
  • Elite Member
  • Posts: 257
  • Thank you received: 50
at the same time we are discussing this on the Dutch forum (knuisje is also there) and we concluded that Fc should best be the average of the Fp and F0 of the LT, so I modified knuisje's spreadsheet

Attachment LT_digital_coefs-20100805.zip not found

Attachments:

Please Log in or Create an account to join the conversation.

Last edit: by Juoigâ.

Re:Linkwitz transform 11 years 9 months ago #905

  • devteam
  • devteam's Avatar
  • Away
  • Administrator
  • Administrator
  • Posts: 9049
  • Thank you received: 1376
Great! Thanks for your participation in keeping everybody updated on the spreadsheet evolution.

In general, with miniDSP Advanced biquad programming, there is so much potential with this feature that we'd hope that others ideas will follow up by those of you experimenting with them...

keep it up! :-)
miniDSP, building a DSP community one board at a time.

Please Log in or Create an account to join the conversation.

Last edit: by devteam.

Re:Linkwitz transform 11 years 9 months ago #910

  • knuisje
  • knuisje's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 48
  • Thank you received: 4
Added a graph.

Attachment LT_digital_coefs-20100806.zip not found

Attachments:

Please Log in or Create an account to join the conversation.

Re:Linkwitz transform 11 years 9 months ago #912

  • Juoigâ
  • Juoigâ's Avatar
  • Offline
  • Elite Member
  • Elite Member
  • Posts: 257
  • Thank you received: 50
great work knuisje!

I made an OO version (and made the graph slightly better looking)

Attachment LT_digital_coefs_v1.zip not found

Attachments:

Please Log in or Create an account to join the conversation.

Moderators: devteam