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Post by markus on May 10, 2010 20:15:35 GMT -5
Maybe so, but using a bluray test disc with dedicated .1 lfe tests shows the same results. What is Main Menu > Setup Speaker Setup > Speaker Size and Crossover > L/R Front and SubWoofer set to? |
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Post by weeman on May 10, 2010 20:28:31 GMT -5
Maybe so, but using a bluray test disc with dedicated .1 lfe tests shows the same results. What is Main Menu > Setup Speaker Setup > Speaker Size and Crossover > L/R Front and SubWoofer set to? crossover is set to 80hz for L/C/R and sub with 24db slopes. test disc has lfe test tones from 10hz to 100hz in 10hz steps |
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Post by markus on May 10, 2010 20:52:09 GMT -5
What is "SubWoofer" set to?
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Post by Nemesis.ie on May 11, 2010 3:43:09 GMT -5
Try Transformers: RoTF, there are massive amounts of LFE in that one.  |
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Post by moodyman on May 11, 2010 5:30:41 GMT -5
That is not a reliable method of testing the LFE EQ. A soundtrack may have little or no info on the LFE channel. Maybe so, but using a bluray test disc with dedicated .1 lfe tests shows the same results. How do you suggest I test the LFE channel eq? I suggest using a dedicated LFE .1 test signal......as you mentioned. You didn't say you used that in your first post. What disc are you using that has a dedicated LFE test signal?? |
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Post by weeman on May 11, 2010 7:15:44 GMT -5
Maybe so, but using a bluray test disc with dedicated .1 lfe tests shows the same results. How do you suggest I test the LFE channel eq? I suggest using a dedicated LFE .1 test signal......as you mentioned. You didn't say you used that in your first post. What disc are you using that has a dedicated LFE test signal?? i'm using the digital video essentials bluray |
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tubby
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Post by tubby on May 11, 2010 8:56:48 GMT -5
For reference this is the description of the DVE LFE signal. Might help in the trouble shooting.
Band Limited Pink Noise
Chapter 18: LFE
40 to 80 Hz noise at -33 dBSF
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Post by leefdalucky on May 11, 2010 10:28:02 GMT -5
I thought there was something wrong with the LFE on DVE.
I think it went to press too soon and may, indeed, suffer from the -10db bug.
I heard that somewhere...
whenever i try my copy it has DISMAL output and I have to up it by 10db just to hear anything.
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Post by darien87 on May 11, 2010 11:07:59 GMT -5
I was using my Rives audio test disc to check the curve of my new 15" sub last night. I found I had about a 5db spike at 25hz. Tried to smooth this out with the UMC-1, but taking 22hz and 28hz all the way down to -10 did absolutely nothing.
I believe this is just stereo audio though, not a dedicated .1 LFE track. So how the hell am I supposed to use the sub EQ?
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Post by markus on May 11, 2010 12:18:48 GMT -5
I think it went to press too soon and may, indeed, suffer from the -10db bug. What -10dB bug? |
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Post by markus on May 11, 2010 12:24:13 GMT -5
I was using my Rives audio test disc to check the curve of my new 15" sub last night. I found I had about a 5db spike at 25hz. Tried to smooth this out with the UMC-1, but taking 22hz and 28hz all the way down to -10 did absolutely nothing. I believe this is just stereo audio though, not a dedicated .1 LFE track. So how the hell am I supposed to use the sub EQ? If the EQ does nothing then it might be a problem with the input signal, settings or the firmware. As to the graphic EQ itself: It's impossible to correct low frequency room modes with a graphical EQ. A parametric EQ is needed that is variable in level, center frequency and bandwidth. This is something that is not open for discussion as Lonnie suggested in another thread. This is physics. |
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Post by darien87 on May 11, 2010 12:51:56 GMT -5
I was using my Rives audio test disc to check the curve of my new 15" sub last night. I found I had about a 5db spike at 25hz. Tried to smooth this out with the UMC-1, but taking 22hz and 28hz all the way down to -10 did absolutely nothing. I believe this is just stereo audio though, not a dedicated .1 LFE track. So how the hell am I supposed to use the sub EQ? Not at all. Forget it. It's impossible to correct low frequency room modes with a graphical EQ. A parametric EQ is needed that is variable in level, center frequency and bandwidth. This is something that is not open for discussion as Lonnie suggested in another thread. This is physics. So I called Emotiva tech and was told by Vince to re-upload the latest firmware. Supposedly not all of the code was downloaded. If that's the case, that's pretty lame. It seemed like everything was fine to me. How am I supposed to know if everything gets uploaded or not? |
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Post by moodyman on May 11, 2010 12:57:27 GMT -5
I thought there was something wrong with the LFE on DVE. I think it went to press too soon and may, indeed, suffer from the -10db bug. I heard that somewhere... whenever i try my copy it has DISMAL output and I have to up it by 10db just to hear anything. This is true. I read this a couple times in my search for LFE test signals. I didn't buy the DVE test disc for this reson. |
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Post by moodyman on May 11, 2010 12:58:23 GMT -5
I believe this is just stereo audio though, not a dedicated .1 LFE track. So how the hell am I supposed to use the sub EQ? You don't. |
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Post by DYohn on May 11, 2010 13:33:53 GMT -5
I was using my Rives audio test disc to check the curve of my new 15" sub last night. I found I had about a 5db spike at 25hz. Tried to smooth this out with the UMC-1, but taking 22hz and 28hz all the way down to -10 did absolutely nothing. I believe this is just stereo audio though, not a dedicated .1 LFE track. So how the hell am I supposed to use the sub EQ? If the EQ does nothing then it might be a problem with the input signal, settings or the firmware. As to the graphic EQ itself: It's impossible to correct low frequency room modes with a graphical EQ. A parametric EQ is needed that is variable in level, center frequency and bandwidth. This is something that is not open for discussion as Lonnie suggested in another thread. This is physics. With all due respect you are simply wrong. It is NOT "impossible" to use a graphic EQ to control low frequency room modes. Is it simpler, easier and more flexible to do so with a PEQ? Yes. of course. But a GEQ can absolutely perform a similar function. Acoustics is acoustics, and yes, it's physics. Please stop with the FUD. |
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Post by jmilton on May 11, 2010 13:48:22 GMT -5
If the EQ does nothing then it might be a problem with the input signal, settings or the firmware. As to the graphic EQ itself: It's impossible to correct low frequency room modes with a graphical EQ. A parametric EQ is needed that is variable in level, center frequency and bandwidth. This is something that is not open for discussion as Lonnie suggested in another thread. This is physics. With all due respect you are simply wrong. It is NOT "impossible" to use a graphic EQ to control low frequency room modes. Is it simpler, easier and more flexible to do so with a PEQ? Yes. of course. But a GEQ can absolutely perform a similar function. Acoustics is acoustics, and yes, it's physics. Please stop with the FUD.  Did someone say Fudd? |
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Post by markus on May 11, 2010 14:05:41 GMT -5
If the EQ does nothing then it might be a problem with the input signal, settings or the firmware. As to the graphic EQ itself: It's impossible to correct low frequency room modes with a graphical EQ. A parametric EQ is needed that is variable in level, center frequency and bandwidth. This is something that is not open for discussion as Lonnie suggested in another thread. This is physics. With all due respect you are simply wrong. It is NOT "impossible" to use a graphic EQ to control low frequency room modes. Is it simpler, easier and more flexible to do so with a PEQ? Yes. of course. But a GEQ can absolutely perform a similar function. Acoustics is acoustics, and yes, it's physics. Please stop with the FUD. I have to disagree. It has been scientifically shown that frequency and Q has to match closely to correct a modal peak. You need to read up on it. There are several AES papers available. From Toole "Sound Reproduction": "In the early days, the equalizers brought to bear on the task were often of the multifi lter “graphic” type—typically octaveor 1/3-octave-band resolution, which matched the resolution of the real-time analyzers used to make the measurements. Room modes can have very high Qs, as can be seen in the narrow spikes in Figure 13.9. We realize now that much of the problem with equalization was that the industry had been performing surgery with a blunt instrument." Best, Markus |
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Post by leefdalucky on May 11, 2010 17:36:30 GMT -5
Markus: -10db bug is just that.
As i recall, the company that produced Joe Cane's disk muffed up on the levels for the LFE and subsequently reduced them by -10 decibels. It was that way for the original DVE on DVD, too.
Unfortunate, but i guess these things happen.
Ummm, to a calibrational disk.
*ahem*
Anybody who I've talked to agrees that it's simply awesome for the Video aspect of your system but "not-so-great" for getting audio quite right.
I think the old avia disk is still the reigning champ if you really want to calibrate your speakers from a source.
All the other L/R/C/Surr/Back are okay. It's just the LFE.
I went bonkers one night trying to figure out why my system didn't do the sweep ok, until i figured out what was going on with the level.
Hope it helps a wee bit, wee.
;op
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Post by loopinfool on May 11, 2010 18:01:53 GMT -5
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Post by markus on May 11, 2010 18:24:57 GMT -5
Markus: -10db bug is just that. As i recall, the company that produced Joe Cane's disk muffed up on the levels for the LFE and subsequently reduced them by -10 decibels. The LFE being -10dB on the disc is correct because the LFE is mixed that way (to get an extra 10dB headroom). Every AVR I know boosts the LFE 10dB by default. |
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