I hold the DIY New England event each year at my place in Canton. Framingham isn't that far from here.
dlr
dlr
Seasoned Veteran
Last Activity: Today, 02:20 AM
Joined: 09-28-2005
Location: Canton, MA
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Thanks John, good to know. I have an idea as to what the issue may be in my code. I'll dig into it to see if it's what I think it is. My code stops at...Leave a comment:
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Your explanations are, to me, always very clear and thorough. Much better than I could do and, I think, helpful to others as you intend.
...Leave a comment:
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A full set of files are available at the Zaph Audio pages I put there. The session files for all versions of the crossover are there as well as the individual...Leave a comment:
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Send me a PM, I'll send you a zip file with a session file that uses the supplied sample files that come with WinPCD. Those files will also be in the...Leave a comment:
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These are the curves that I get for out-of-phase average of the polar reponses. Not power evidently, though I had thought that averaging a broad range...
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Glad you dropped in, John. The result of my program that does a sum of points in the front hemisphere roughly matches yours in general shape, the +6db...Leave a comment:
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I don't have time this evening to post window captures, but I just ran a comparison such as DDF described. I've got the results of full front hemisphere...Leave a comment:
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Dave, I agree with you, but...
I was working on the horizontal and vertical auto-calculations and got the idea of doing a full front hemisphere...Leave a comment:
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This is what DDF is referring to:
dlr...Leave a comment:
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I misunderstood your description. Most often I see references here to biquad as the implementation, not the equations.
dlr...Leave a comment:
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So there are two issues. Q seems to have a single definition, whereas damping factor has more than one.
The second issue is how a filter...Leave a comment:
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That's not correct, Dave. Q in filters is defined outside of implementation. Biquads are not the only means by which those filters can be implemented....Leave a comment:
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You're right about first order, my mistake.
I based my comment on the "Q" for L-R from what I recall of Linkwitz's posts and from...Last edited by dlr; 12-17-2018, 11:00 AM. Reason: Deleted my poor description of the paper's two equations 8-9 and 8-10. See the paper page 8.7.Leave a comment:
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When Linkwitz was active on the Madisound board, we were discussing Q. IIRC, it was he who pointed out that there can be an infinite number of filters...Leave a comment:
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OK. Thought maybe it was the peaking of the group delay you were referencing since all LR filters have Q=0.5. I think it's confusing to say that the LR16...Leave a comment:
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Are you referring to the shape of the group delay curve???
dlr...Leave a comment:
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The magnitude of this misunderstanding is astounding.
Evidently you don't understand what power response actually represents and how...Leave a comment:
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Well, no. Since DSP needs precise input, a Butterworth Q is, to eight decimal places anyway, 0.70710678. You entered a value that would actually introduce...Leave a comment:
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