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Post by foggy1956 on Oct 5, 2017 21:30:00 GMT -5
Have a read HERE It should help a bit. Thx Fatty I’ve been through that thread a bit lately it’s a lot to take in but has very good info. It took more than a little while to feel comfortable with REW. It provides a lot of info to chew on.
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Post by dust770 on Oct 6, 2017 5:22:17 GMT -5
One thing I do differently, is that I also run a set of filters from REW into the minidsp prior to running dirac When I said I get them in the ballpark I meant in terms of FR. So I also create filters in the minidsp using REW. I let Dirac then adjust for distance/phase and final FR according to my target curve. One question, if Dirac corrects for the subs what would the benefit of having a minidsp apply filters and then having Dirac also apply filters? Doesn’t it all add up to the same amount of filters applied be it Dirac or minidsp or the combo of both?
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Post by foggy1956 on Oct 6, 2017 6:30:27 GMT -5
When I said I get them in the ballpark I meant in terms of FR. So I also create filters in the minidsp using REW. I let Dirac then adjust for distance/phase and final FR according to my target curve. One question, if Dirac corrects for the subs what would the benefit of having a minidsp apply filters and then having Dirac also apply filters? Doesn’t it all add up to the same amount of filters applied be it Dirac or minidsp or the combo of both? My opinion only, smoothing bass freq response prior to Dirac may free up its processing power in other regions. The cleaner the signal you provide the less work it has to do. Kind of like adding room treatments before doing eq.
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geebo
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Post by geebo on Oct 6, 2017 6:52:37 GMT -5
When I said I get them in the ballpark I meant in terms of FR. So I also create filters in the minidsp using REW. I let Dirac then adjust for distance/phase and final FR according to my target curve. One question, if Dirac corrects for the subs what would the benefit of having a minidsp apply filters and then having Dirac also apply filters? Doesn’t it all add up to the same amount of filters applied be it Dirac or minidsp or the combo of both? I think getting the subs "in the ballpark" makes for a better overall end result with Dirac for me and my room. I have some very pronounced peaks and getting them tamed lets me run Dirac without having to reduce the sub level in Dirac so those peaks don't clip in Dirac. It would be similar to having a sub with a built-in PEQ that one might adjust before running Dirac which is what I did with my X-Ref subs.
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Post by jamco on Oct 6, 2017 8:12:58 GMT -5
One question, if Dirac corrects for the subs what would the benefit of having a minidsp apply filters and then having Dirac also apply filters? Doesn’t it all add up to the same amount of filters applied be it Dirac or minidsp or the combo of both? I think getting the subs "in the ballpark" makes for a better overall end result with Dirac for me and my room. I have some very pronounced peaks and getting them tamed lets me run Dirac without having to reduce the sub level in Dirac so those peaks don't clip in Dirac. It would be similar to having a sub with a built-in PEQ that one might adjust before running Dirac which is what I did with my X-Ref subs. I use the same “in the ball park” approach with my Velodyne DD12 Subwoofer. I start out with an automatic EQ on the DD12 and then manually fine tune the EQ for about 20 minutes using continuous sweeps. Dirac does the rest with my tower speakers that have 10” woofers. The outcome is near flat low frequency response for a challenging room and sounds is amazing. We purchased another home and moved in about 2 months ago. My hope is this room won’t be as challenging when I finally get the time to setup the system. This weekend I’ll be attending Audiofest in Denver.
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fattykidd
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Post by fattykidd on Oct 6, 2017 10:14:08 GMT -5
Plus this then allows you to listen in direct mode without Dirac but still have an acceptable bass response.
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geebo
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Post by geebo on Oct 6, 2017 10:46:48 GMT -5
Plus this then allows you to listen in direct mode without Dirac but still have an acceptable bass response. Very good point.
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KeithL
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Post by KeithL on Oct 6, 2017 11:20:08 GMT -5
I've also spoken to a few folks who have three or four subs (the XMC-1 only individually calibrates two). You can put four subs on a MiniDSP, let it calibrate all four, then connect a single sub output from the XMC-1 to the MiniDSP. (That gives you individual calibration on all four subs). Plus this then allows you to listen in direct mode without Dirac but still have an acceptable bass response.
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Post by dust770 on Oct 6, 2017 14:13:27 GMT -5
I've also spoken to a few folks who have three or four subs (the XMC-1 only individually calibrates two). You can put four subs on a MiniDSP, let it calibrate all four, then connect a single sub output from the XMC-1 to the MiniDSP. (That gives you individual calibration on all four subs). Plus this then allows you to listen in direct mode without Dirac but still have an acceptable bass response. So is it then incorrect when I stated above that Dirac does not phase for two sub locations ? I read on here in the past it will not phase two subs together
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geebo
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Post by geebo on Oct 6, 2017 14:20:27 GMT -5
I've also spoken to a few folks who have three or four subs (the XMC-1 only individually calibrates two). You can put four subs on a MiniDSP, let it calibrate all four, then connect a single sub output from the XMC-1 to the MiniDSP. (That gives you individual calibration on all four subs). So is it then incorrect when I stated above that Dirac does not phase for two sub locations ? I read on here in the past it will not phase two subs together If you set the XMC for Dual Mono or Stereo subs it will treat each individually. If you feed a single XMC output to the minidsp that is in turn feeding multiple subs then Dirac will it as if the were only one sub.
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KeithL
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Post by KeithL on Oct 6, 2017 14:39:36 GMT -5
The Dirac room correction on the XMC-1 measures and calibrates each channel independently.
Since the XMC-1 supports one or two subs, you can calibrate one or two subs. (Since the phase of each sub is calibrated, there shouldn't be any unexpected interactions between them.) The catch is that, if you have three or four subs, the XMC-1 cannot calibrate ALL of them individually, and simply paralleling them in pairs may not yield a satisfactory result. Therefore, if you have three or four subs, you may be better off using a MiniDSP to calibrate all of them. (Once all of the subs have been calibrated by the MiniDSP, it makes sens to consider "the set" as a single "black box subwoofer" and connect it to one channel on the XMC-1.) I've also spoken to a few folks who have three or four subs (the XMC-1 only individually calibrates two). You can put four subs on a MiniDSP, let it calibrate all four, then connect a single sub output from the XMC-1 to the MiniDSP. (That gives you individual calibration on all four subs). So is it then incorrect when I stated above that Dirac does not phase for two sub locations ? I read on here in the past it will not phase two subs together
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Post by dust770 on Oct 6, 2017 15:25:51 GMT -5
So is it then incorrect when I stated above that Dirac does not phase for two sub locations ? I read on here in the past it will not phase two subs together If you set the XMC for Dual Mono or Stereo subs it will treat each individually. If you feed a single XMC output to the minidsp that is in turn feeding multiple subs then Dirac will it as if the were only one sub. Did you use the mic that came with the XMC, or the one Mini dsp sells? If I use the mic from the XMC would I need a specific calibration file for it?
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fattykidd
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It's ok.. I have an et-3.
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Post by fattykidd on Oct 6, 2017 15:27:30 GMT -5
The Dirac room correction on the XMC-1 measures and calibrates each channel independently.
Since the XMC-1 supports one or two subs, you can calibrate one or two subs. (Since the phase of each sub is calibrated, there shouldn't be any unexpected interactions between them.) The catch is that, if you have three or four subs, the XMC-1 cannot calibrate ALL of them individually, and simply paralleling them in pairs may not yield a satisfactory result. Therefore, if you have three or four subs, you may be better off using a MiniDSP to calibrate all of them. (Once all of the subs have been calibrated by the MiniDSP, it makes sens to consider "the set" as a single "black box subwoofer" and connect it to one channel on the XMC-1.) So is it then incorrect when I stated above that Dirac does not phase for two sub locations ? I read on here in the past it will not phase two subs together Even though there "shouldn't" be unexpected interactions... Sometimes there is. Plus setting filters independently doesn't take into account how they/multiples smooth fr throughout the room, if one has a peak or at least desirable output at 40hz and the other a dip... Dirac cuts one and boosts the other, when in the minidsp case they "should" sum together and level/smooth this particular mode on their own. Or at least theoretically.. I think this is why the op is losing "the punch" from his single sub when adding multiples.
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geebo
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Post by geebo on Oct 6, 2017 15:41:26 GMT -5
If you set the XMC for Dual Mono or Stereo subs it will treat each individually. If you feed a single XMC output to the minidsp that is in turn feeding multiple subs then Dirac will it as if the were only one sub. Did you use the mic that came with the XMC, or the one Mini dsp sells? If I use the mic from the XMC would I need a specific calibration file for it? I use a calibrated UMIK from Cross Spectrum. You'll need a cal file to use the XMC mic or any other mic for that matter with REW. To get one you can look up user ansat and at the bottom of his signature you will find a link to some cal files.
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Post by jamco on Oct 6, 2017 17:57:31 GMT -5
Did you use the mic that came with the XMC, or the one Mini dsp sells? If I use the mic from the XMC would I need a specific calibration file for it? I use a calibrated UMIK from Cross Spectrum. You'll need a cal file to use the XMC mic or any other mic for that matter with REW. To get one you can look up user ansat and at the bottom of his signature you will find a link to some cal files. I too use a calibrated UMIK from Cross Spectrum. A microphone boom stand helps me maneuver the mic around, a tape measure and painters tape is helpful for marking my reference points and I use a USB-3 extension cable on the mic to place my MacBook in a comfortable place with an adult beverage.
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Post by dust770 on Oct 6, 2017 20:29:06 GMT -5
Did you use the mic that came with the XMC, or the one Mini dsp sells? If I use the mic from the XMC would I need a specific calibration file for it? I use a calibrated UMIK from Cross Spectrum. You'll need a cal file to use the XMC mic or any other mic for that matter with REW. To get one you can look up user ansat and at the bottom of his signature you will find a link to some cal files. Ok thanks I tracked down the cal file. Not sure what file I had before but I was using some sort of cal file. Didn’t ansat have a house curve file somewhere as we’ll? Haven’t seen him on in a long time.
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Post by dust770 on Oct 6, 2017 20:30:02 GMT -5
I use a calibrated UMIK from Cross Spectrum. You'll need a cal file to use the XMC mic or any other mic for that matter with REW. To get one you can look up user ansat and at the bottom of his signature you will find a link to some cal files. I too use a calibrated UMIK from Cross Spectrum. A microphone boom stand helps me maneuver the mic around, a tape measure and painters tape is helpful for marking my reference points and I use a USB-3 extension cable on the mic to place my MacBook in a comfortable place with an adult beverage. Would this umik mic be a considerably improvement over the XMC included mic?
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Post by foggy1956 on Oct 6, 2017 20:45:20 GMT -5
I too use a calibrated UMIK from Cross Spectrum. A microphone boom stand helps me maneuver the mic around, a tape measure and painters tape is helpful for marking my reference points and I use a USB-3 extension cable on the mic to place my MacBook in a comfortable place with an adult beverage. Would this umik mic be a considerably improvement over the XMC included mic? Yes
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geebo
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Post by geebo on Oct 6, 2017 20:48:29 GMT -5
^ What he said.
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Post by jamco on Oct 6, 2017 23:18:18 GMT -5
^ Agreed.
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