Linkwitz-Riley Filter Noise



  • Hi @Christoph-Hart

    I am getting crackle, noise and unstabile curves in Scriptnode's Linkwitz-Riley filter. You can watch the video. I also tried several smoothing options, but no luck.

    I also want to make 3 band frequency splitter with that but the middle band is not available. There is an AP mode but it don't have dual frequency ends (right side for connecting HP and left side for connecting LP)?



  • @Steve-Mohican Many of the filters are making strange crackling noises in Hise. I know the Ladder Filter has no issues, but for the other ones, it's annoying...

    if you need a mid-band, you can just stack up an LP followed by a HP... That's not the purpose of an AP, which is just the "phase colour"



  • @Christoph-Hart Any progress?



  • Yes, they are not really suitable for parameter modulation - I have made a few changes a few weeks back that improves the modulation behaviour, but if you can avoid it, I would suggest using them with static parameters.

    There's no Linkwitz riley bandpass, you have to build up a network and add an all pass to compensate the phase delay like this:

    HiseSnippet 1413.3oc6Z06baTDEeWIuIQBGlvPlgVMgFmYb7XYaRXFJjveEzfkiHxIjtLquas0N9ztG2sx1JApfB5nFJHTBMzSWlgV7LLi+KfR5LMTPSXe2dR2cRmhMJ1XR3tJsu881826i828NcWCOoEy2W5gvE1nqKCgmjzrqP0ZoVTt.UaYD90I0o9JlWIinE65R88Y1HLN+sAA3BSfBtNpxhTGpvhEIBgtujawVi2lqhj1n5GxcbVkZy1f2Nl1KTslkTrjzQ1Qim7jYQtTqcnayVmBpkifvWXEatR50TQULesNKJs61rkbOgQ+6y84a5vfAkQM0KjQLZoVbG6F87UeDBOQiHOOuwyuJoN2l2WdTD3JASTJxh3w.btjPZhDPpbbHMaLHspzwFV.PkggGJF5lvfNMHj1cbnpjHCRAgSvkIyN0DJlvmq5FOEctB22fzfqrZkNdykBd0IpyZ7Fl7uLYks1hYoh.6DjUev3loKmJTRsPDObrqHookG2Uo2e.HSFNrzpOnbB.YDiv+.YEw1bAaFKOlFZK66tNSsmzamotlsu60tdo26xE2pivBh3kb8XtTO1FxFNztS4Sa65vtq1poKsoizZml7GwtdwGWrPwOqXoXFEfwEAMlxpEUHXN9CqFb3Un7jNSI5zdSl2zk1k5zIZ8F576EOYgPonlfqtiKKTsD9POwZ1hXnLRZePEIJkJh6J6n3hsqSUd78QXx5cZ2TSCYwVJza0xv4PfoAimEFCEnMYB6fAOSeENYYXLNbxx8lDA3fITZ4g4mf7e3u0+BR1DhNkARk15vvkVkZoCWcaPUsfiOZ5Qkt9j4MiU+5zK.VTFoA7fPcMcbHgXbdXY6QvZv+Rx1sAPAzqg+9i41v1QvSq0vTvcWccBPVW2ONcMNGrdFuvfW.PWj365n46GI1MSeVAXnbpA0SeKC8Msf0HmYU.XlKFLKRbj6ciMoBazwDkOWBsCh4BFNIG2jn8sHawc.GcFGtXm83pG4wcXcOWvbOlNMUY9HN9MndayTArtQYE8x0eD3ahcYdJis04h6CrFwW45z8SJ6KOr5Zx8XdCzYwBUumq6fR051TwbAlMP1270v0OUo4Nr8LgRP5Ae5ueqOu8AUfn7qQV0i8IcXBqtn9aKDAQe29UQmDbOev0gUhi6C9E35sG.28zLIt6o6wi6+5a+9+7Z+wuFf67jOBMPn6nJnSdbdtmNTbFMWpw44dZJwYstGOd6AKCyUPCjCriwKTNVHiPCC4ipjFjQnzf7QUhC4Ge0e71+1i9hAf7y59jFu4xGFVZzrsTpZouUQDt6Y1KHtQUO43FkHT22WdNg55.KRJgZOod0UbfpAkfoglwzb9vzXxuOIioIio4UVll3GPSiCJnCsKSZysuQK9KYMo0G1fgYbnYcqkwglwgdJvgBUGCyTdQyyxpoaNWep6Q8L1.U3+8ouwI57cyrNey57Mi0Ni09bqy2BjWJ55MIsYqLZyLZyLZyLZyyhlcGMs4K5L3bwhMWvDI0daolA8KehNxW8qh4yDxryTFE2eAIyOfCpe1TLdIoltK3UmFfingH7j.+WM6vW4SeDBRhyAnMIHW5A8ZWyVSIBu+7631+EIyTl88eLMl1mNMowLwfU120i46G3gZVbTpdbx++jWUc8AK5JR9.9np4zb6CealeN1FG75xGXKu4v2fXvJt7inhidlWwMBO5zNreySVEWvi78+LOt0qtd7nuIv8psLUQgNWC+VLhoJFuLaWtEy3jEHKy72QIc+24SCoM0xS9PKyGpBbz7RARzGQEAe6aEH0gwkJi10DOAOeVjlnj+PKKHedixHT51L2XXy7igMKLF17NigM2bLr4VigMu6y0F3SB786njsMeHaZAMVIn3BiWQP2zwbn.82vCGp+6
    


  • @Christoph-Hart Oh, thanks.

    I increseed mouse sensivity of the slider, so it is more slow and these frequency jumps are more stable.

    Thanks for the bandpass example!


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