need some help calibrating

[CSEmoses]

I'm not gonna mess with this tonight. Hockey game... and had a real bad morning @ work, so i wasnt in a great mood when i started this, this afternoon. Then i had trouble with it... man, i was just about ready to throw the RS SPL meter out a window... not that I ever would.

Would it be easier to 'walk' me through this over the phone? I only ask because i've got unlimited long distance in North America.

[CSEmoses]

One more thing. In my mixer control panel thingy, which looks like yers, Line In is under playback, not recording. Strange....

anyhow, i'll give it another shot sometime tomorrow, maybe in the early evening.

[brucek]

Line In is under playback, not recording. Strange....

That's normal. I think it's actually listed under both in mine.

Once you've played around with this for a bit, you'll find it easy...

brucek

[CSEmoses]

BruceK, i'm having trouble understanding what i need to do while setting the 'Input Volume'. It gives me the message shown in the following linked picture:
http://www.imagemonster.net/is.php?i...error_when.jpg

What am i supposed to do here?
my receiver is at my normal listening volume for LOTR type movies, which is where I want it for the tests, and happens to be where it reads the targeted 75db in the first Set Measurement Level calibration.

Am I correct in saying that if i increase my system volume, the Set Measurement Level test is for naught, because the Input Volume calibration is based on the setting (on the RS meter) used in the Set Measurement test?

[CSEmoses]

I totally made a bad assumption!
When doing the original Set Measurement Level, i was reading the amount shown in the big black letters at the left of the REQW screen, assuming that this was a straight reading from the RS meter... which it obviously wasnt.

Now then! ... i went and looked at the SPL meter, and did both the set measurement level, and set input volume tests correctly (i hope!) and i'll move onto the next ones here shortly.

Will update if need be

thanks again, man!

[CSEmoses]

Ok, i'm onto the soundcard calibration... the explanation built into REQW isnt exactly clear... see image:
http://www.imagemonster.net/is.php?i...soundcard_.jpg

Am i supposed to match the number in the 'Soundcard Measurement Inp' window with the big black 7.3 on the left side there?

Think i'm almost ready to (accurately) measure my little subwoofer! *cheer*

[brucek]

Am i supposed to match the number in the 'Soundcard Measurement Inp' window with the big black 7.3 on the left side there

No, you don't do anything here other than hit CONTINUE and REW takes care of doing the test.

BTW, have you read the very excellent REW HELP FILES? They explain all this very simply.

brucek

[CSEmoses]

OK bruce, we're measuring!

only one questions for you though no error message this time... heh...

Why do you say to measure to 200hz? isn't there a crossover in the AV processor, even with the mains set to small, that's going to throw all the stuff over say 120hz to the mains?

Anyhow, i'll post a graph measuring from 25hz to 134hz, as above that there's no point.

http://www.imagemonster.net/is.php?i..._correctly.jpg

The **** <img> tags arent working.

[Wayne A. Pflughaupt]

Here it is:



Regards,
Wayne

[brucek]

Anyhow, i'll post a graph measuring from 25hz to 134hz, as above that there's no point.

Measure from 10Hz to 200Hz. The automatic sweep starts at DC and then ends an octave above 200Hz. This ensures the response is accurately captured throughout the requested range.

Use horizontal axis from 15Hz to 200Hz and vertical axis from 45dB to 105dB.

Set your graph to LOG and not LIN.

brucek

[CSEmoses]

hrm, i thought i had the axis set correctly.
and i swear i thought i had it set to log