Forums > MaxMSP

How to make a cossover ?

May 6, 2010 | 7:18 am

Hi,

I want to simulate a crossover for testing loudspeakers. I did some patches with 2 filtergraph (1 lowpass and 1 highpass centered a the same freq), but the result is a very thin sound…
I looked at the result with a filtergraph in display mode and it looks what I ear : a dramatic filter.

I don’t understand why the sum the lowpass and highpass is not the full signal (at least not so far away)?

Any help would be appreciate !!!

Blo


May 6, 2010 | 7:19 am

And I’m with MAXMSP 4.5


May 6, 2010 | 7:29 am

Try cross~, which is a well hidden standard object.

It looks like it has been forgot when Cycling74 did their documentation as I can’t find it in any "see also" section, not in the "New object" filter section. It"s still the case with Max5.


May 6, 2010 | 10:22 am

Well, we can certainly fix that oversight….


May 6, 2010 | 11:01 am

@ Patrick Delges : thx for cross~ !!!

but :
1 it’s only 3rd order filters, I can’t test 1st and 2nd order.
2 I still don’t understand why the filtergraph don’t do the job ?

Any idea ?


May 6, 2010 | 11:09 am

have you considered building an FFT crossover? a good starting point would possibly be the forbidden planet example.


May 6, 2010 | 11:14 am

@ the_man361 : yes, but I don’t know how to tune the order. What I was able to do was to sharp, sort of 10th order or so…


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