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  Topic Review (Newest First)
02-10-15 04:30 PM
Wayne A. Pflughaupt
Re: Help with set up please!

Quote:
nwf477 wrote: View Post
I guess my next question when I apply smoothing what is the preferred there are several to choose from?
Depends on what you’re measuring and what you want to see. For sub-specific graphs, no smoothing is preferable. For full range graphs, 1/3 or 1/6-octave smoothing will eliminate the comb filtering and get you a graph that better resembles what you’re actually hearing. These are the best graphs as well for manually applying equalizing to the main speakers. Unsmoothed graphs showing all the comb filtering can give you an idea of how “live” your room is. “Before” and “after” measurements could give an idea of how effective room-dampening acoustical treatments are (although other acoustics-specific measurements are probably more helpful with this).


Quote:
The last question considering I have a peak around 70hz is that just the way my room harmonics are and I would imagine once I get a second sub that should come down a bit.
The peak is a mode, and it’s a function of the size of your room and the location of the sub. Adding a sub in a second location could indeed mask the mode, but might introduce new ones. Measurement is the only way to know for sure what's going on.


Quote:
Hate to be a pain but doing the target level, it should be approx. between the peaks and the nulls correct and the target range do I have to set it or let REW set it?
Yes, it’s a good idea to move the Target to a good half-way point between the peaks and nulls before having REW run its auto-filtering function, or for the sake of applying manual equalization.


Quote:
Thanks again.
Happy to help we’re here to serve.

Regards,
Wayne
02-10-15 02:37 PM
nwf477
Re: Help with set up please!

Okay if the level is fine just do what the guide says correct? I guess my next question when I apply smoothing what is the preferred there are several to choose from? The last question considering I have a peak around 70hz is that just the way my room harmonics are and I would imagine once I get a second sub that should come down a bit. Hate to be a pain but doing the target level, it should be approx. between the peaks and the nulls correct and the target range do I have to set it or let REW set it? Finally doing better I am on the right path if I can stumble my way thru the hard way of setting this up once I get the mic I will use my son's laptop and do it the easy way.
Thanks again.
Norman
02-10-15 02:16 PM
JohnM
Re: Help with set up please!

Quote:
nwf477 wrote: View Post
according to Donny at AVS the db level should be between 80 and 100 mine was 75 back to the drawing board.
The level is fine as it is.
02-09-15 06:37 PM
nwf477
Re: Help with set up please!

Here is my first measurement pretty blah. I tried smoothing according to Donny at AVS the db level should be between 80 and 100 mine was 75 back to the drawing board.
02-09-15 02:39 PM
Wayne A. Pflughaupt
Re: Help with set up please!

Glad to hear you're making progress.

Quote:
nwf477 wrote: View Post
So next question after you take a measure how do you know what to adjust and by how much on a dsp? For me it is going to be on the Inuke nu3000dsp.
Youll have to use REWs generic EQ setting for that one. Its going to be trial-and-error, though measure, EQ, measure tweak EQ, etc.

Quote:
Also can the window be resized when I ran the measurement it was all pretty much squeezed together.
Id have to see a .jpg of the graph to know what youre talking about.

Regards,
Wayne
02-09-15 12:36 PM
nwf477
Re: Help with set up please!

Maybe this makes sense to you but here goes a few months ago when I bought the card I was looking for a better sound and since I had 7.1 ht I thought why not the diamond had good reviews etc. I was concerned about the 7.1 channel so I called Diamond I was told the card is only going to play back the information it gets so I would imagine you are correct.
As far as the default when I ran REW it did it automatically WAVE was 100% REW volume was at 50%. So I guess with the exception of hooking up the rca to phono I set it up right ( must have been by accident!! )? So next question after you take a measure how do you know what to adjust and by how much on a dsp? For me it is going to be on the Inuke nu3000dsp. Also can the window be resized when I ran the measurement it was all pretty much squeezed together.
If I am on the right track I think I will pat myself on the back.
02-09-15 12:18 PM
Wayne A. Pflughaupt
Re: Help with set up please!

Quote:
nwf477 wrote: View Post
I used the Y 3.5mm from the line in on the computer to the rca output of the spl. I went from the left and right rca output of the sound card to a phono input on rcvr.
Sounds like you have the correct wiring, but using the phono input is a problem. Use any other input.


Quote:
I did a check level for the sub I noticed the first and the third meter were reading. The second the input db fs was not.
That’s normal. The meter is only feeding one of the inputs.

This just occurred to me, but the sound card should be set in its menu for straight-up stereo operation. No 5.1, no surround sound, etc. And you do have the sound card set as the default recording and playback devices in Windows, right?

Regards,
Wayne
02-09-15 11:34 AM
nwf477
Re: Help with set up please!

Hi Wayne
This is getting aggravating to put it mildly. If you check the other thread I started in REW (REW and SPL) it explains exactly what I did today and what I used. I thought maybe if I started a thread in the REW site I might get more help. Just in case I decided to re use the Diamond external sound card. I used the Y 3.5mm from the line in on the computer to the rca output of the spl. I went from the left and right rca output of the sound card to a phono input on rcvr. I checked the correct input and output for the sound card under preferences. I did a check level for the sub I noticed the first and the third meter were reading. The second the input db fs was not. I tried adjusting OS vol. rew volume nothing I checked the cables to see if they were hooked up wrong still nothing. Then for the what the I tried changing the tab from the right channel to the left. Now both the output and input meter are reading just not the third ref in. I adjusted both in/out to within 6db. I went to the measure tab did a check level it came back around 96-97db and it was okay but I also got a small window saying a file was corrupt. I went ahead with a measure I have a pretty good peak at 70hz and the freq goes down to a little beyond 20hz. Am I at least doing something right or am I out in left field? As much trouble as this has become I am tempted to give it up until I build the second sub and get the correct mic. w/ the proper cal. chart. By the way the only way I could get the -18dbfs was to reduce the level on the spl, once I went from 80 to 70 I was able to use the OS vol and the rew vol. to make the adjustment. Hope I gave you enough info. to hopefully guide me thru this.
Thanks Norman
02-09-15 10:49 AM
Wayne A. Pflughaupt
Re: Help with set up please!

Quote:
nwf477 wrote: View Post
My mistake in preferences in the Sound Card tab there is check levels tab. I can set the 75db then it says to adjust the input volume to read between -12db FS to -24db FS by using the soundcard mixer, rew volume control, OS audio control. These have zero effect
This tells me that the signal isnt getting through from the mic (RS meter) into the sound system. I assume the meter is working (set to the 80 dB position?), so I imagine things are getting jammed up at the sound card.
What sound card outputs are you using to your stereo?

Regards,
Wayne
02-09-15 03:34 AM
nwf477
Re: Help with set up please!

My mistake in preferences in the Sound Card tab there is check levels tab. I can set the 75db then it says to adjust the input volume to read between -12db FS to -24db FS by using the soundcard mixer, rew volume control, OS audio control. These have zero effect I can adjust the avr volume in addition to those to get the -18db fs. After this part I go to SPL meter tab prior to measurement, if I adjusted the previous input volume to read -18dbfs the db reading here is going to be off and even when I set it then hit calibrate it shows the highest it can measure is 130 db. When I then go to Measurement and hit start measuring I get a window that says my signal level is to low and I need to increase so it is reading -25db fs ( mine is around -55 to -66 db fs.) So that is where I am at stuck again. Is my avr not good enough, I have a Yamaha RX-V1600, or is the computer a HP Compaq 6000Pro Microtower with a generic Microsoft sound card not capable of this or is it just the meter dragging down the input volume. This is turning into a nightmare.
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