miniDSP SHD only does 2 channels of Dirac. I want 2 subs. Options?

[kharan]

I thought stereo subs was DLBC only? The Dirac in minidsp is stereo with mono subs.

I mean what the OP was initially complaining about, there's nothing wrong about measuring each sub as part of the main speakers and treating the whole as a big three way.

 

[Hayabusa]

All I am asking for is automatic room correction that also does subs, and allows me to use my existing DAC / amp. Why are you making it sound like I am asking for the moon and stars?

I gave you the solution already

 

[Mort]

DLBC does not do stereo subs.

ART then, I guess? Same outcome. MiniDSP doesn't support it.

 

[MarkS]

DLBC and ART both use a mono bass signal below the user-set crossover. That mono signal is then distributed among the subs.

 

[Geertidow]

NAD C658 also does 2 channel calibration I think. It doesn't treat the sub separately.

If you want little work and 4 channel dirac you still need to go for devices that support DIRAC live bass control or ART.
Even though that is not pure 4 channel but you won't hear that

 

[Geertidow]

By the way I have a 2.2 music only setup with a MiniDSP flex.
@OCA helped me design filters to great satisfaction (surpassing DIRAC which I also have).

 

[Ultrasonic]

1) No volume attenuation prior to it's ASRC which can lead to intersample clipping

Note that this is no longer true, with the required attenuation now having been added.

On Inter-Sample Peaks - miniDSP SHD User Manual

docs.minidsp.com

 

[markstein]

Note that this is no longer true, with the required attenuation now having been added.

On Inter-Sample Peaks - miniDSP SHD User Manual

docs.minidsp.com

This is exactly what I wrote...

"1) No volume attenuation prior to it's ASRC which can lead to intersample clipping, especially when using the integrated Volumio streamer. This was solved in the meantime by a firmware update."

 

[levimax]

The PC Stereo version of Dirac DLBC supports 2 mains speakers and up to 4 subwoofers. The OP would need a PC and a 6 channel interface but the OP could then use his mains and subs whether active or passive.

 

[MarkS]

The OP would need a PC

OP:

Anyone know of other devices (not a PC or different amp)

 

[Ultrasonic]

This is exactly what I wrote...

"1) No volume attenuation prior to it's ASRC which can lead to intersample clipping, especially when using the integrated Volumio streamer. This was solved in the meantime by a firmware update."

Oh sorry! So you did .

 

[marked sound]

OP:

The reason I don't want PC room correction is because I want correction applied to my streaming video content as well. I have been told that getting the PC video signal that is sent to the tv, synced with the PC room corrected audio sent to your amp is a nightmare to get going and keep stable.

I would rather have the audio from my TV go to a device to get room correction, and then separately have my streaming music audio sent to the device for correction.

 

[Ultrasonic]

It instead wants to do some goofy thing where it incorporates the subs as part of the mains. This seems problematic as the subs will placed in different parts of the room from the mains. Whats worse is I did not see any where on the sight to upgrade the Dirac license for the SHD to more than 2 channels.

The way it works with integrated two subs using an SHD is as I'll describe below. It's not automated like DLBC but not 'goofy' in that it very much does work and actually this functionality is the number one reason I've used miniDSPs for several years now.

The SHD has four independent output channels, which can each have their own time delays, crossover filters and other DSP. To integrate two subs with two main speakers you use measurements made using REW to decide on what the appropriate time delays, crossovers filters and (rough) levels are to integrate the subs with the main speakers. This then produces a 'left speaker' which is the left main speaker plus sub(s) and a 'right speaker' that is the right main speaker plus sub(s). Then you run Dirac Live and it behaves exactly the same with these combinations as it would as if there were two full-range speakers. So here you get the advantages of Dirac Live for controlling the combined frequency response and phase adjustments to improve the impulse response. What the stereo version of Dirac Live doesn't do (but DLBC does) is to do the initial subwoofer delay and crossover optimisation.

In my own system I have integrated a single sub as above but it can be down with two as well. MSO can also be used when two subs are used.

 

[marked sound]

The PC Stereo version of Dirac DLBC supports 2 mains speakers and up to 4 subwoofers. The OP would need a PC and a 6 channel interface but the OP could then use his mains and subs whether active or passive.

But then how do i get my tv streaming content calibrated?

The way it works with integrated two subs using an SHD is as I'll describe below. It's not automated like DLBC but not 'goofy' in that it very much does work and actually this functionality is the number one reason I've used miniDSPs for several years now.

The SHD has four independent output channels, which can each have their own time delays, crossover filters and other DSP. To integrate two subs with two main speakers you use measurements made using REW to decide on what the appropriate time delays, crossovers filters and (rough) levels are to integrate the subs with the main speakers. This then produces a 'left speaker' which is the left main speaker plus sub(s) and a 'right speaker' that is the right main speaker plus sub(s). Then you run Dirac Live and it behaves exactly the same with these combinations as it would as if there were two full-range speakers. So here you get the advantages of Dirac Live for controlling the combined frequency response and phase adjustments to improve the impulse response. What the stereo version of Dirac Live doesn't do (but DLBC does) is to do the initial subwoofer delay and crossover optimisation.

In my own system I have integrated a single sub as above but it can be down with two as well. MSO can also be used when two subs are used.

You had me interested until you said "meaurements using REW" I have no interest in spending multiple lifetimes learning and fiddling with REW. I want to hook up a mic, press a button for calibration, wait for calibration to finish, unplug the mic, then just listen. I have no interest in doing one smidgen more.

 

[bluefuzz]

NAD C658 also does 2 channel calibration I think. It doesn't treat the sub separately.

No, the C658 has four independent channels of Dirac calibration. Two mains and two subs. Which is why it is precisely the device the OP is dreaming of except he seems to be married to his existing DAC for some as yet undisclosed reason.

 

[bluefuzz]

I have no interest in spending multiple lifetimes learning and fiddling with REW

Now you're just being silly. If you've already hooked up the mic for the Dirac calibration it will take all of ten minutes longer to do two sweeps in REW ...

 

[Hayabusa]

I have no interest in doing one smidgen more

Really? I say goodbye now...

 

[Geertidow]

No, the C658 has four independent channels of Dirac calibration. Two mains and two subs. Which is why it is precisely the device the OP is dreaming of except he seems to be married to his existing DAC for some as yet undisclosed reason.

I known measures it seperately, but does it perform DIRAC per device?

 

[Ultrasonic]

I thought stereo subs was DLBC only? The Dirac in minidsp is stereo with mono subs.

This part isn't true with the SHD. The user can choose to configure the system with either a mono or stereo sub arrangement whilst integrating the subs using the miniDSP software. I don't see a good reason why anyone would want to do anything other than using a mono subs configuration though.

 

[marked sound]

Now you're just being silly. If you've already hooked up the mic for the Dirac calibration it will take all of ten minutes longer to do two sweeps in REW ...

Is it something that requires me to just press a button and 95 year old grandma can figure out? If so please tell me more.