**miniDSP DDRC-88A Official Thread**8-channel AI/AO Dirac Live in a box - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 16656 Old 12-08-2014, 11:16 AM
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Originally Posted by kbarnes701 View Post
If the delay is a known quantity then it can easily be added manually by adjusting the distance settings of the non-Dirac channels. Or use two DD88s - that is the route I am drawn towards even though it doubles the cost.
FWIW the nanoavr dl costs you 26ms (https://minidsp.desk.com/customer/po...oavr-dl-or-hd-). I believe they all use the same minisharc internally so it seems likely that the the actual delay of this one isn't going to be markedly different.
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post #32 of 16656 Old 12-08-2014, 11:19 AM
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Is the UMIK-1 the only mic usable? Or can any USB mic with a calibration file be used?
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post #33 of 16656 Old 12-08-2014, 11:28 AM
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Originally Posted by Tin_Can View Post
Is the UMIK-1 the only mic usable? Or can any USB mic with a calibration file be used?
They say only the UMIK-1 can be used. From p16 of the user manual:

Note: the miniDSP UMIK-1 is the only measurement microphone that can be used with the DDRC-88A and DiracLive Calibration Tool for miniDSP.
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post #34 of 16656 Old 12-08-2014, 11:34 AM
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Originally Posted by KurianOfBorg View Post
How will you align multiple subs without purchasing additional hardware? I don't think the latency will exceed 16ms like the other Dirac unit.
Not a problem for me, since I have miniDSP10x10HD.
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post #35 of 16656 Old 12-08-2014, 11:39 AM
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Wonder what this means for Datasat and the Auro branded pre/pros. Two MiniDSP DDRC-88s and a good mainstream pre/pro with 11 pre-outs and Atmos/Auro capability renders them obsolete except for more esoteric HT configurations, unless there's something like Dirac Unison coming down the pipeline for, say, the RS20i.

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post #36 of 16656 Old 12-08-2014, 11:49 AM
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post #37 of 16656 Old 12-08-2014, 11:56 AM
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Quote:
Originally Posted by kbarnes701 View Post
They say only the UMIK-1 can be used. From p16 of the user manual:

Note: the miniDSP UMIK-1 is the only measurement microphone that can be used with the DDRC-88A and DiracLive Calibration Tool for miniDSP.
I was worried about that, but should I be? Has there been any independent testing of these mics? It's a shame that a dedicated theater could be compromised by something as minor as a mic.
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post #38 of 16656 Old 12-08-2014, 12:09 PM
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I got an email with this in and am wondering what benefits this has over say the nanoAVR DL with Dirac live?


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post #39 of 16656 Old 12-08-2014, 12:10 PM
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Originally Posted by Tin_Can View Post
I was worried about that, but should I be? Has there been any independent testing of these mics? It's a shame that a dedicated theater could be compromised by something as minor as a mic.
The UMIK-1 mic is highly regarded in the REW threads, where these things matter a lot.
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post #40 of 16656 Old 12-08-2014, 12:13 PM
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I got an email with this in and am wondering what benefits this has over say the nanoAVR DL with Dirac live?
The main difference is you can use it to correct anything attached to your existing processor as opposed to just correcting your bd player. There is also the argument about correcting after bass management rather than before (which is more debatable in practice but not in theory).
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post #41 of 16656 Old 12-08-2014, 12:14 PM
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I got an email with this in and am wondering what benefits this has over say the nanoAVR DL with Dirac live?
The nanoAVR is an all-digital solution which has to be applied to a PCM output. This, for one thing, precludes its use with Atmos which requires a bitstream. Becuase the nano has to be connected via HDMI, it really has to go between the digital source, say a Bluray player, and the amplifiers whereas the DDC-88 can be used with all sources by interposing it between the prepro and the amplifiers. This requires the use of full external amplifiers in order to work. (Anyone mourning the loss of the old 'tape loop'?).
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post #42 of 16656 Old 12-08-2014, 12:43 PM
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Originally Posted by 3ll3d00d View Post
The main difference is you can use it to correct anything attached to your existing processor as opposed to just correcting your bd player. There is also the argument about correcting after bass management rather than before (which is more debatable in practice but not in theory).
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The nanoAVR is an all-digital solution which has to be applied to a PCM output. This, for one thing, precludes its use with Atmos which requires a bitstream. Becuase the nano has to be connected via HDMI, it really has to go between the digital source, say a Bluray player, and the amplifiers whereas the DDC-88 can be used with all sources by interposing it between the prepro and the amplifiers. This requires the use of full external amplifiers in order to work. (Anyone mourning the loss of the old 'tape loop'?).

Thanks for the answers. Seems as if I were to go ATMOS or the like this would be great. But since I will be holding off on that and currently only have my PC hooked up to stream video and audio from that the nanoAVR will do me fine.


One other question though for down the road when I do decide to go the ATMOS way, could I still use the nanoavr and the DDRC-88A together? Say I run 4 speakers from the nanoavr and another 6 off the DDRC, would that be possible? Not sure on how to measure for that though.


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post #43 of 16656 Old 12-08-2014, 12:49 PM
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Thanks for the answers. Seems as if I were to go ATMOS or the like this would be great. But since I will be holding off on that and currently only have my PC hooked up to stream video and audio from that the nanoAVR will do me fine.
If you only have a PC then just get Dirac live on the pc, no need for a nano avr at all.
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post #44 of 16656 Old 12-08-2014, 01:05 PM
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Wonder what this means for Datasat and the Auro branded pre/pros. Two MiniDSP DDRC-88s and a good mainstream pre/pro with 11 pre-outs and Atmos/Auro capability renders them obsolete except for more esoteric HT configurations, unless there's something like Dirac Unison coming down the pipeline for, say, the RS20i.

What ever you do don't tell this guy!

http://www.audiocircle.com/index.php?topic=130535.0

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post #45 of 16656 Old 12-08-2014, 01:12 PM
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Originally Posted by BCRSS View Post
One other question though for down the road when I do decide to go the ATMOS way, could I still use the nanoavr and the DDRC-88A together? Say I run 4 speakers from the nanoavr and another 6 off the DDRC, would that be possible? Not sure on how to measure for that though.
No. Atmos requires a bitstream output from the BD player whereas the nanoAVR requires a PCM output.
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post #46 of 16656 Old 12-08-2014, 01:22 PM
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Thanks for the info guys. I may hold off on getting either of these units and see what comes out down the road seeing as ATMOS is still pretty new.


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post #47 of 16656 Old 12-08-2014, 01:23 PM
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What ever you do don't tell this guy!

http://www.audiocircle.com/index.php?topic=130535.0

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There's a guy that's been attempting to sell a Datasat on the AVS classified periodically...the ad sounds similar, so it may be the same person.

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post #48 of 16656 Old 12-08-2014, 01:50 PM
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Looks like it may be time to start saving my pennies, nickles and dimes for a miniDSP DDRC-88A.
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post #49 of 16656 Old 12-08-2014, 01:51 PM
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Looks like it may be time to start saving my pennies, nickles and dimes for a miniDSP DDRC-88A.
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post #50 of 16656 Old 12-08-2014, 04:14 PM
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The DDRC-88A has both balanced and un-balanced inputs via Phoenix terminal blocks. Will need a solution for those with XLR pre-outs.
As others have written, non-issue. Those of us OCD enough to want all of our wires cut to length anyway will just save the cost of one connector.

My only surprise is that there's no remote turn on/off. There's a socket for it on the board, assuming that it's the 8x8 board locked down to Dirac, as the DDRC is a locked OpenDRC.

Also, hopefully they'll have OSX software soon, now that they have three Dirac-based products.

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post #51 of 16656 Old 12-08-2014, 07:24 PM
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As was estimated by earlier posters, the delay for the DDRC-88A is 20 to 22ms per MiniDSP and they said delay will be double confirmed in 2 weeks, so delay should not be a concern. I ought to at least get my new AV7702 setup properly to see what it can do, before buying this, but I can see one of these in my near future.
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post #52 of 16656 Old 12-08-2014, 07:38 PM - Thread Starter
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Guys,

Thanks for the feedback on the initial post - appreciate the well thought out ideas. AVS is a great place be in.

Would like to make a list of pre/pro/receivers that can connect up to this box of tricks. The minimum requirement are analogue outputs. Some have already suggested multi units of the DDRC-88A to cater from more than 8 channels to do new formats such as Atmos/Auro as well as heights and wides. Concern is ensuring the target curve is common for both boxes.

Also thinking about a list of multi-channel amps that will connect to the DDRC-88A. Might include the power rating of each amp and the retail pricing so people can judge what's best for their particular room. This should help newbies to separates rather than the integrated receiver solution that most are familiar with.

Considering to put the above in the second post. Let me know if this is a good idea or not.

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post #53 of 16656 Old 12-08-2014, 09:03 PM
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Looks like it may be time to start saving my pennies, nickles and dimes for a miniDSP DDRC-88A.
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So you will finally start putting those to use?
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post #54 of 16656 Old 12-08-2014, 09:59 PM
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Hopefully the software implementation is good as there's no more HDMI. The nanoAVR DL was quite buggy.
Time to look for good multichannel amp (preferably class D).
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post #55 of 16656 Old 12-08-2014, 10:03 PM
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Using two of these at once won't work as you expect. They are obviously not simple PEQs. Each unit will end up with different delays and different average corrected response curves since you are measuring totally different sets of speakers from potentially different measuring locations. There is no way each one will average out to the same response because of the way their algorithm merges the measurements.
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post #56 of 16656 Old 12-08-2014, 10:23 PM
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Originally Posted by KurianOfBorg View Post
Using two of these at once won't work as you expect. They are obviously not simple PEQs. Each unit will end up with different delays and different average corrected response curves since you are measuring totally different sets of speakers from potentially different measuring locations. There is no way each one will average out to the same response because of the way their algorithm merges the measurements.
My gut tells me this won't work very well, either. But, who knows. I think the first measurement is the most important. As long as you have the mic in the exact same position for both units, maybe it will work.

It would be nice if they would come up with a way to link two units together. They have USB ports. Link 'em together! Hehe.
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post #57 of 16656 Old 12-08-2014, 11:52 PM
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Delay concerns me to.
Just heard back from miniDSP. The device latency will be around 20ms. They will publish the exact number in the manual and datasheet.

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We need a MiniDSP that can EQ 9.3.6 channels (Atmos/Auro-3D/UHD/MDA). ...Only eight channels won't cut it anymore nowadays.

And we also want 32-bit DACs (32-bit/352kHz). ...For all eighteen (18) channels.
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post #59 of 16656 Old 12-09-2014, 12:19 AM - Thread Starter
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Just heard back from miniDSP. The device latency will be around 20ms. They will publish the exact number in the manual and datasheet.
Markus,

Once the actual delay is confirmed, I'll include it in one of the first 5 posts.

This is something users will have to keep in mind and make a manual adjustment on the AVR in order to get the lip sync timing to be right. I.e. audio and video signal timing are correct.

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post #60 of 16656 Old 12-09-2014, 12:20 AM
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Originally Posted by KurianOfBorg View Post
Using two of these at once won't work as you expect. They are obviously not simple PEQs. Each unit will end up with different delays and different average corrected response curves since you are measuring totally different sets of speakers from potentially different measuring locations. There is no way each one will average out to the same response because of the way their algorithm merges the measurements.
What would be the problem? Dirac Live measures the in-room response of single speakers and optimizes them. As long as you measure speaker pairs (like L/R or LS/RS) with the same unit I don't see any problems.

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