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Post by dust770 on Sept 29, 2017 13:08:19 GMT -5
I have the line out on this going into the analog in left and right on my XMC. Should I be using the hdmi output on my Mac laptop instead? I’m really just wanting to try and do a manual preset. Although I love Dirac for my 7 speakers Its very inconsistent with sub results, I have to run it over and over ... to get it back to where I like it. I recently moved my surrounds and need it rerun |
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Post by leonski on Sept 29, 2017 13:53:38 GMT -5
Dust?
You're finding out that bass is the WORST to set up. This due to very long wavelengths when compared to most room dimensions.
50hz (not all that low, right?) has a wavelength of about 22 feet, based on 330 meters per second or nearly 1100 feet per second.
Speed of sound varies so I'm using easy numbers for approx.
A 20hz note will have a wavelength of about 55 feet.
These long wavelengths are why it is so difficult to tell where a very low tone is coming from. And why a single sub should be set to a fairly low
frequency. At some point, you can identify WHERE it is
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Post by dust770 on Sept 29, 2017 20:08:20 GMT -5
Dust? You're finding out that bass is the WORST to set up. This due to very long wavelengths when compared to most room dimensions. 50hz (not all that low, right?) has a wavelength of about 22 feet, based on 330 meters per second or nearly 1100 feet per second. Speed of sound varies so I'm using easy numbers for approx. A 20hz note will have a wavelength of about 55 feet. These long wavelengths are why it is so difficult to tell where a very low tone is coming from. And why a single sub should be set to a fairly low frequency. At some point, you can identify WHERE it is If I could at least figure out how to get the test tones to play through the XMC I could begin to try to learn a little but alas I’m stuck, no other ideas on how to do this anyone? |
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geebo
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"Too bad that all the people who know how to run the country are driving taxicabs and cutting hair"
Posts: 24,181
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Post by geebo on Sept 29, 2017 22:06:28 GMT -5
Dust? You're finding out that bass is the WORST to set up. This due to very long wavelengths when compared to most room dimensions. 50hz (not all that low, right?) has a wavelength of about 22 feet, based on 330 meters per second or nearly 1100 feet per second. Speed of sound varies so I'm using easy numbers for approx. A 20hz note will have a wavelength of about 55 feet. These long wavelengths are why it is so difficult to tell where a very low tone is coming from. And why a single sub should be set to a fairly low frequency. At some point, you can identify WHERE it is If I could at least figure out how to get the test tones to play through the XMC I could begin to try to learn a little but alas I’m stuck, no other ideas on how to do this anyone? Are you connecting the computer to the XMC with HDMI or USB? |
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Post by leonski on Sept 30, 2017 0:38:48 GMT -5
As soon as you get the tones playing, you'll be up-against the wall of measurement. Bass is very tricky and if you look at 'plots' of speakers, you may see in the fine-print that the 300hz UP trace is 'spliced' to the 300hz DOWN trace due to different techniques needed to measure. Depending on Size / Shape of room you could be in a 'null' or 'peak' and not know it. Best bet MIGHT be to take the speaker outside in a Quasi-Anachoic Space and measure JUST THAT from maybe 300hz down in order to be able to later integrate properly with the room. amcoustics.com/tools/amroc?l=25&w=14&h=8.5&ft=true&r60=0.6There are a BUNCH of these, but this one is cool. Nice visuals, too. If your room 'stacks' modes just a few hz apart, it could be trouble. Regular 'cubic rectangle' rooms are easiest to compute. |
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Post by dust770 on Sept 30, 2017 1:44:33 GMT -5
If I could at least figure out how to get the test tones to play through the XMC I could begin to try to learn a little but alas I’m stuck, no other ideas on how to do this anyone? Are you connecting the computer to the XMC with HDMI or USB?  I’m using this with rca jacks into the analog in |
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Post by dust770 on Sept 30, 2017 1:45:31 GMT -5
As soon as you get the tones playing, you'll be up-against the wall of measurement. Bass is very tricky and if you look at 'plots' of speakers, you may see in the fine-print that the 300hz UP trace is 'spliced' to the 300hz DOWN trace due to different techniques needed to measure. Depending on Size / Shape of room you could be in a 'null' or 'peak' and not know it. Best bet MIGHT be to take the speaker outside in a Quasi-Anachoic Space and measure JUST THAT from maybe 300hz down in order to be able to later integrate properly with the room. amcoustics.com/tools/amroc?l=25&w=14&h=8.5&ft=true&r60=0.6There are a BUNCH of these, but this one is cool. Nice visuals, too. If your room 'stacks' modes just a few hz apart, it could be trouble. Regular 'cubic rectangle' rooms are easiest to compute. Wish that was possible but at 300lbs I can’t really take it outside |
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Post by leonski on Sept 30, 2017 2:16:18 GMT -5
Ouch! Hernia City!
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Post by bolle on Sept 30, 2017 3:11:49 GMT -5
Use HDMI so you can use Asio4All to generate a test tone on each channel easily separately.
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Post by dust770 on Sept 30, 2017 3:46:08 GMT -5
Ya getting it into position solo was a chore and my other one is 400lbs so jockeying them around for best position was a bit of a workout. Must have moved them around the room 20+ times. They do slide fairly easy at least |
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Post by dust770 on Sept 30, 2017 3:47:22 GMT -5
Use HDMI so you can use Asio4All to generate a test tone on each channel easily separately. Thanks, A member of my home theater group on Facebook recommended this but it doesn’t appear to work for a Mac laptop. |
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Post by bolle on Sept 30, 2017 5:09:35 GMT -5
I don´t know no stinkin Mac, sorry!   |
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geebo
Emo VIPs
"Too bad that all the people who know how to run the country are driving taxicabs and cutting hair"
Posts: 24,181
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Post by geebo on Sept 30, 2017 8:06:39 GMT -5
Are you connecting the computer to the XMC with HDMI or USB? I’m using this with rca jacks into the analog in What about just using a USB connection from your computer directly to the XMC-1? That's the way I do it. You don't need an external sound device with the XMC. |
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Post by enricoclaudio on Sept 30, 2017 12:08:05 GMT -5
Use HDMI so you can use Asio4All to generate a test tone on each channel easily separately. Thanks, A member of my home theater group on Facebook recommended this but it doesn’t appear to work for a Mac laptop. It does work on MacBook Pro. It works even better than for windows computers because it shows each speaker with real name denominations like FL, FR, C, LFE, etc and not by HDMI channel. Just go into Applications/Utilities/Audio Midi Setup and select HDMI. Then go to Output/Configure Speakers and select 5.1 or 7.1 depending on your system speaker configuration. Then reopen REW and you should see all your speakers available!!!    |
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Post by dust770 on Sept 30, 2017 13:38:10 GMT -5
What about just using a USB connection from your computer directly to the XMC-1? That's the way I do it. You don't need an external sound device with the XMC. Thanks this might be my problem I never even thought to try it as a straight connection. When I first got Rew I needed this little behringer and have always thrown it in the mix |
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Post by dust770 on Sept 30, 2017 14:08:51 GMT -5
Thanks, A member of my home theater group on Facebook recommended this but it doesn’t appear to work for a Mac laptop. It does work on MacBook Pro. It works even better than for windows computers because it shows each speaker with real name denominations like FL, FR, C, LFE, etc and not by HDMI channel. Just go into Applications/Utilities/Audio Midi Setup and select HDMI. Then go to Output/Configure Speakers and select 5.1 or 7.1 depending on your system speaker configuration. Then reopen REW and you should see all your speakers available!!! Thanks I will dig deeper into this! |
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Post by dust770 on Sept 30, 2017 14:22:44 GMT -5
Thanks, A member of my home theater group on Facebook recommended this but it doesn’t appear to work for a Mac laptop. It does work on MacBook Pro. It works even better than for windows computers because it shows each speaker with real name denominations like FL, FR, C, LFE, etc and not by HDMI channel. Just go into Applications/Utilities/Audio Midi Setup and select HDMI. Then go to Output/Configure Speakers and select 5.1 or 7.1 depending on your system speaker configuration. Then reopen REW and you should see all your speakers available!!! Perhaps I’m looking in the wrong place for this but when I go to Asio4all.com I see no option for anything but windows pc. Is this a free program or do I need to purchase it somewhere else’s? Thanks |
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Post by enricoclaudio on Sept 30, 2017 15:07:25 GMT -5
You don't need ASIO drivers (Asio4all.com) on Mac OS because Mac OS works with Core Audio which is already embedded in the OS X so no need for additional software to use REW. Just connect your Mac Book Pro with an HDMI cable into the XMC-1 and that is it, you are done!!!
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Post by dust770 on Sept 30, 2017 15:10:17 GMT -5
You don't need ASIO drivers (Asio4all.com) on Mac OS because Mac OS works with Core Audio which is already embedded in the OS X so no need for additional software to use REW. Just connect your Mac Book Pro with an HDMI cable into the XMC-1 and that is it, you are done!!! Wow REW Newbie alert! I was making that much harder than I needed to. Thanks for clearing it up! |
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Post by leonski on Sept 30, 2017 23:44:13 GMT -5
I'm definately NOT current, but the MacBook Pro has HDMI port?
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