posted
It does not state that during the RTA Run there is an spl cap, or did you make the mic read higher than 136 dB? Also it does not say where the RTA mic is placed during testing.
I also think that 16 volt batteries should have a place in psyclone maybe in a pro class. We can't leave out people with high volt systems. We have manufacture supporters who sell these products.
I can't wait to see people bring out the 31 band 1/3 octave EQ's like in the old days of awesome sounding demo's.
Either way I like the basic rules and why not
Still working on different classes but more vehicles results and I will get done my report sooner for ya Wayne.
Thanks
[ 02-19-2009, 03:59 PM: Message edited by: dB Don ]
-------------------- -Donald Hebig -All Out S.P.L. Saskatchewan's dB Drag event promoter -Check the Termpro homepage partners for the companies I support. Posts: 2600 | From: Borden, Saskatchewan. Canada | Registered: Feb 2000
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posted
I talked to Wayne about this briefly and I suggest that the RTA mic be placed, with a mic stand, facing forward at 28" above the seat(part you sit on). Also I believe you should replay th same exact song at the same point in the track that you played it for your SPL run with a cap at 130db and be penalized points for excedeing that mark. Another suggestion I have is that as far as the open doors thing is concerned is make it location permisive for the doors open but at World finals know that the one door must be open(only a World finals REQUIREMENT). I really look forward to this format and believe it to be another great addition to what is currently the best overall SPL formats around. later Doug
posted
Ya I missed the door thing, I agree have it open door for worlds but if a show can't have open doors due to noise closed doors should be fine.
I don't think having a song for the RTA measurment is a wise idea. Pink noise should be used. Music will be all over the place and no one would score anything if at all. You couldn't reliably find frequency deviations with music.
Its all about the ability to control your audible spectrum. So pink noise would be the thing to use off the official CD.
-------------------- -Donald Hebig -All Out S.P.L. Saskatchewan's dB Drag event promoter -Check the Termpro homepage partners for the companies I support. Posts: 2600 | From: Borden, Saskatchewan. Canada | Registered: Feb 2000
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arent we trying to get the excitement back into competing.. and get regular guys into it..
who drives around listening to pink noise?
this is about music...
i love the idea of bonus points based on lower frequency peaks.
-------------------- Team Maxxsonics . Kinetik Power Maxxsonics Team Captain 2005 WF SM 1-2 6th place 2006 WF SM 1-2 4th Place : U.S. Points 3rd w/315 points : SPLMax Competitor of the Year. 2007 WF SM 1-2 4th Place : U.S. Points 9th w/215 points : Top U.S. SM 1-2 certified score. 2007 Usaci State Records : Mod 2001-4000 : Mod 4000-up : Port Wars Open : Street Beat 4. 2008 Sold the nissan and took a break to build a new minitruck. 2009 Coming back with Bass Race & Psychlone in the minitruck.
quote:Originally posted by Team Naptime: i dont agree with the pink noise.
arent we trying to get the excitement back into competing.. and get regular guys into it..
who drives around listening to pink noise?
this is about music...
i love the idea of bonus points based on lower frequency peaks.
You do realize that points for the RTA portion are awarded for 1/3 harmonic deviations right? Well with music you would score very low if at all with music because of the dynamic nature of music. If you could somehow get music to measure flat at all freqencies(which would be pink noise) at the same time the music would sound horrible anyway.
The point of the measurement is your ability to control all frequncies accross the full spectrum of sound and the greater that ability generally you have the ability to really tune it to sound amazing.
Just a tip for those wondering, most stock vehicles sound systems when set flat with a bit of the bass/treble tweeked down will do very well. Some(not all)vehicles are acoustically set up in such a way when designed that they are tuned for the Fletcher Munson curve from factory.
When I started in IASCA in the early 90's I had stock speaker locations with aftermarket coax's I regularly scored 35+/40 on the SQ. The guys that went that extra bit and did kicks, EQ's etc.. were the only ones doing better consistantly.
So anyone can do this relatively easy and with very little investment and an EQ master the SQ portion, for the spl portion the sky is the limit. So have fun.
-------------------- -Donald Hebig -All Out S.P.L. Saskatchewan's dB Drag event promoter -Check the Termpro homepage partners for the companies I support. Posts: 2600 | From: Borden, Saskatchewan. Canada | Registered: Feb 2000
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posted
If you measure RTA with music, you might as well not do it at all.
Take an audio control 3055 and plug a CD player directly into it (RCA out from CD player into the RCA in of the Audio Control) and play some music. Look at the RTA screen and you will instantly see why you can't use music. The Audio Control will likely have the IASCA and/or USACi scoring software on it. Hit fast, medium, slow and then pause. Hit the score button (small button on the back of the unit) and look at the score.
That will show you just using the music and not even bringing in teh vehicle's acoustics and the speaker trying to reproduce the content. All of which makes it even more difficult. Do some pink noise the same way and unless your HU is crap, you will see a perfectly flat line.
Also if you want it to be a real challenge you need to make it so that you use pink noise and don't allow for a ski slope curve. Hitting 136dbs on pink noise is not that hard if you are allowed to ramp it. Meaning the bass on the curve will be huge and at the top (this is where the 136dbs will come from) and then you start a slow gradual hill down to around 500hz and then you flatten out from 500hz to 20khz. The hill stays within 3db of each band.
I did the above with a flat out SQ system and hit upper 120's with a perfect score in RTA during testing. At finals that year I had one deviation. This is with a TRUE Sq system. It wouldn't be hard with subs bigger than a 10" to get upper 130's and still ramp it down and stay perfect.
If it is being measured with music--I wouldn't even bother trying to set an RTA curve. I would max out the other sections as best you can and throw some dice on the ground for your RTA score---you have the same control over both results.
posted
This all looks good, but one thing that makes me concerned is the judging. I host Db Drags and Bass Race events here in New England and have no problem metering SPL, but I've never dealt with RTA's, setting them up or using them. So when it comes to judging the RTA portion I'll be clueless and not be able to judge this they way it should be done. Is there going to be some kind of instructions available with the RTA Upgrade for the event promoters like me? Or will the local certified judges be able to train people on the Psychlone judging process?
posted
Something I was thinking about, Drags and Bass Race shows take so long to run now, if this new format does gain in popularity and more people run with it then shops aren't going to want to run Drags shows cause we'll be there til after dark. As it is, we're running shows til after the shops normal business hours, they're hardly going to let us run a show if it takes even longer. Maybe there should be the option of running either Bass Race and Psychlone, or Drags and Psychlone , but not all three.
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