DCX EQ |
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The Builder
Old Croc Joined: 03 January 2010 Status: Offline Points: 3107 |
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Posted: 05 October 2014 at 7:36pm |
Hi, should know the definitive answer but always puzzled me?
EQ: On the inputs or individual outs? Ta |
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It just is.
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Goodvibetribe
Young Croc Joined: 06 December 2011 Location: Cardiff Status: Offline Points: 959 |
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Individual speaker correction Eq on the outputs. Flattening or EQing the whole system on the inputs
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George c - www.gorilla-audio.co.uk facebook.com/gorillaaudiohire
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The Builder
Old Croc Joined: 03 January 2010 Status: Offline Points: 3107 |
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OK ta
Edited by The Builder - 06 October 2014 at 10:58am |
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It just is.
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SMP
Young Croc Joined: 16 March 2013 Location: East London Status: Offline Points: 1226 |
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!!!!!!!!!!!!!?????? |
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The Builder
Old Croc Joined: 03 January 2010 Status: Offline Points: 3107 |
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Constructive.
So let's look at this: I would always EQ system on the inputs because I remeber analogue crossovers with graphic eq's in front of them. Having said that does it matter if someone does it on the individual outs, knowing they want to, for arguments sake, boost their bass cabs by 5db @ 40hz? If it does matter then why? I think on a DIY forum it's a valid issue, thank God I'm old enough to not have an ego and ask the question. Wouldn't mind betting their are many newbies, learners and starters who don't ask questions like this because of the hostility and snotty nosed bollocks of some. Thank you GoodVibeTribe for your answer, hope it helps others to learn. |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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You should do it on the input stage so that any phase shift affects all drivers equally. If you do it on the per channel output stages you will affect one section of the PA only and will cause phase anomalies around the overlap/crossover points
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SamV
Old Croc Joined: 21 October 2008 Location: London Status: Offline Points: 8707 |
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True but sometimes where you don't have enough channels and are using the xover, you may have to do it on the outputs to reign any room anoalies in.
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SMP
Young Croc Joined: 16 March 2013 Location: East London Status: Offline Points: 1226 |
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I would think that is a bit irrelevant in this case it is digital so all is within the DSP's so where are the filter phase errors? normal to apply in band corrections if required so does not matter where in the chain it is unlike an analogue setup where the above is very pertinent as the filters will most certainly exhibit phase errors |
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audiomik
Old Croc Joined: 06 April 2010 Location: Bath, UK Status: Offline Points: 2962 |
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DSP phase errors occur for each type of EQ or crossover filter as with the analog equivalents that are being emulated digitally.
That is assuming that you don't have FIR Filters in your DSP, which the DCX doesn't Mik |
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SMP
Young Croc Joined: 16 March 2013 Location: East London Status: Offline Points: 1226 |
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I see Zeros & 1's NOT my thing at all. So i stand corrected. incidentally of what Magnitude are these errors?
If I had perhaps taken a moment to consider Clocks etc it would have been more apparent. If these errors are of significant non linearity or have a time vector of Musically significant period they will really matter. but i guess there are still less than analogue? or still comparable? |
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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Non-FIR DSP's basically aim to emulate standard analogue responses, so for example if you input a 6dB, 1000Hz cut with Q=3 on an analogue PEQ and then do the same in the DCX, you should end up with exactly the same amount of phase shift either way. Couple of caveats though - in analogue, you can be limited by the resolution of the silkscreening on the front of the panel, and the exact pot taper & component tolerance may make things a little approximate, so I really should have said if you "achieve" matching cuts on the 2 platforms rather than simply "input". Similarly on the digital side, there are some aspects of how things like Q are calculated (especially for filter magnitudes less than 3dB) that vary from manufacturer to manufacturer, so again the correlation between input value and actual response should really be checked.
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RobinMatrix
Young Croc Joined: 23 August 2013 Location: Kidderminster Status: Offline Points: 567 |
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+1 .. keeps it all simple and easy to understand. |
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Matrix Pro Audio ::http://matrixproaudio.com/"
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