System target curve and equal loudness contour |
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Foca_Dacian
Registered User Joined: 05 February 2011 Location: Romania,Cluj Status: Offline Points: 118 |
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Posted: 28 August 2018 at 3:18pm |
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I need a little guidance, I am new to this: Let's say I go to a venue where I install a PA and I have a live gig on it later. I take out my measurement gear(dual channel FFT),choose the best position and aim for the speakers,align the system and then I have to eq it. Is there a standard target eq curve for equing a sound system ? I have read about the equal loudness contour and the fact that we do not hear linear (well it gets more linear at higher SPL,but still not flat).Do I have to take this into account? What do you guys do ? |
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JulianDA
Registered User Joined: 29 May 2018 Location: Soest, Germany Status: Offline Points: 112 |
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Hey,
For starting, I usually choose a slightly downwards sloping curve towards higher frequencies, like something in the range of -4 to -6dB from 200Hz-10kHz. This sounds a little "warmer" than a completely flat frequency response. In addition almost everybody likes a little more low-end, so i boost the frequencys below 100Hz with a slight lowshelf of approx. +3dB (or +6, depending on the kind of music). After this you can try to reduce the 1kHz and 2kHz content with a relatively narrow eq to your own liking. But most of the time thats not necessary for me. But keep in mind that thats just the way i do it. i am sure there are many ways of achieving a subjectively nice sound. |
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corell
Young Croc Joined: 19 August 2013 Location: Berlin Status: Offline Points: 1161 |
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EQing to Fletcher Munson (equal loundess curves) is the way to go imo!
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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music is recorded with the Fletcher Munson curve accounted for! definitely cut midrange at high volumes https://forum.speakerplans.com/uploads/8883/Void_System_Tips_EQ.pdf boost bass below 200Hz as desired. particularly at 100Hz for more impact. I'm not sure about large amounts of boost at 10k-20kHz. A lot of sound engineers have hearing loss at these frequencies and seem determined to give it to everyone else too
Edited by snowflake - 28 August 2018 at 6:25pm |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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On studio levels. Btw which artist likes flat speakers?
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njw
Old Croc Joined: 26 March 2010 Location: S. Wales Status: Offline Points: 2572 |
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I run with a +6dB shelf from 12khz and up as my horns are CD so I find it's needed to bring out the 'sparkle'. It does result in quite a bright sound when the system is played at high volume in an empty room but I find that once there's a few bodies in soaking up the sound it balances out nicely. Or I may just be going deaf!
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Pasi
Old Croc Joined: 25 April 2010 Location: Knutsford Status: Offline Points: 2733 |
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Never ever. Especially for live sound. Never ever. Live sound: Max +6 on subs and smooth either flat or slightly downward sloping response all the way to the highs. Constant -3dB per decade can work well, sometimes not. It depends on what kind of live music it is for. But never ever ever equal loudness. That's what engineer behind the desk does with his skills and tools and he is an artist who deserves a clean canvas and not something which has blue sky and some dirt on the ground ready for him. |
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Pasi
Old Croc Joined: 25 April 2010 Location: Knutsford Status: Offline Points: 2733 |
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And tuning a system is bit more than pulling a mic out, pointing it to speakers at "optimum" location and going from there. That's one way, but definitely won't yield the best results. |
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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I wouldn't call that system eq - that's speaker correction.
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njw
Old Croc Joined: 26 March 2010 Location: S. Wales Status: Offline Points: 2572 |
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Good point Sir!
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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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id say thats room corretion :-p
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me so horny me love you long throw
horn loaded for her pleasure |
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csg
Old Croc Joined: 17 September 2007 Location: bedford Status: Offline Points: 6086 |
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measurement for timing / phase alignment by all means. then use your ears and some very well known test material ( tracks).
i worry about any "engineers" that spend too much time staring at a laptop screen whilst eq'ing a system, music is a human thing and needs a human to tune it, not a machine.
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“The fact is this is about identifying what we do best and finding more ways of doing less of it better”
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