test tones

[lsiberian]

normc,
Perhaps a flawed approach isn't quite it. The math for the averaging you described simply doesn't work; 70 dB and 50 dB do not average 60dB - neither aurally, nor mathematically. But, again, it's nitpicky. You achieved a sound quality that works. Why nitpick it?

Hehehe I love that.

Basically dB is a logarithmic scale and not a linear one.

10 db is the equivalent of twice as loud in theory(in practice it's usually 6 db)

So from 50 to 70 db would be like going from

1 * 2 * 2 in theory and in practice it would be like going from 1 * 2 * 2* 2

to get the result you would need to do some math.

 

[normc]

StrongbadF1,

I've already made a test tone CD with a tool that I got off the internet. It gives the ability to generate the tones on your own computer, specify the frequency to a million decimal places (?), the duration, sine wave, square wave, pink noise, white noise, levels, the works. Don't have its name on this computer but I'll post it tonight from my home computer.

Savant,

Many thanks for that additional info. I'll do that as well to check and adjust my existing settings. Its a matter of very fine tuning now but as we know, the difference between a good sound and a great sound can be minor subtleties.

Norm

 

[normc]

Jeff,

Can't thank you enough for that little procedure. Just completed the check and the system was pretty spot on. SPL(C) was exactly 1-2db > SPL(A) over a 6ft wide x 10 ft deep area centered around the listening position and I couldn't be more pleased. To make it any better I think I'd have to spend thousands more on the room acoustics and/or the gear, but for now its sounding as good as any system I've ever heard and with the SPL1000U, the bass is as big as I've heard in any cinema, except it's more musical.

For those that might be interested, that test signal generator doesn't have any reference to its author but its simply called 'Test signal wave file generator - vers. 1.02'. I found it by googling something to that effect and a number of options came up, this one being what I thought was the best of them.

Cheers, Norm

 

[normc]

I found the audio test signal generator referred to in my earlier post. The URL is;

http://www.tropicalcoder.com/ASIOTestSigGen.htm

I can recommend this tool for it's applicability and versatility. It does generate .wav files only but they can be converted if necessary to whatever format you need with any one of a number of conversion tools also available on the net.

I hope you find them useful.