TOPIC:

I am a bit confused with the wording in the FLEX specs. On the sample rate it says:
"32 bit/96 kHz (32bit/48 kHz with Dirac Live® license)"
This can mean one of two (or more) things:
1 - if you run it from the Device Console (no Dirac), it will run at 96kHz; if you run it from Dirac it runs at 48kHz.
or
2 - since your unit came with a Dirac license, it will always run at 48kHz.

Anybody knows which it is? Unless informed otherwise, I go with 1 for now.

Jan

The Dirac capability consumes more resources, so the sampling rate is reduced to accommodate that.
I believe all of the miniDSP Dirac capable units operate this way.

Even though you've purchased a license, you can still operate the unit without Dirac at the higher sampling rate.......if you so choose.

Dave.

Yes I understand the reason for the difference.
I just found the wording in the spec sheet ambiguous.
Thanks for confirming I guessed right

BTW Am I right that there's no place in DC to change SR?
If there is, I can't find it.

Jan

No, you're locked in on the sampling rate unless you perform the un-Dirac reconfiguration change.  As I understand it.

Dave.

OK. What's an 'un-Dirac reconfiguration change'?
Is that when I connect it on DC with Dirac off?

Edit: I do some REW room measurements and I need to tell REW what sample rate the Flex runs.
I'm gambling on 96kHz. It's connected to DC with Dirac off.

Jan

dreite wrote:

The Dirac capability consumes more resources, so the sampling rate is reduced to accommodate that.
I believe all of the miniDSP Dirac capable units operate this way.

The SHD series models are the exception. According to the product pages anyway.

jan.didden wrote:

OK. What's an 'un-Dirac reconfiguration change'?
Is that when I connect it on DC with Dirac off?

Edit: I do some REW room measurements and I need to tell REW what sample rate the Flex runs.
I'm gambling on 96kHz. It's connected to DC with Dirac off.

Jan

No, it's a firmware change to revert to the non-Dirac Live capable state that is required, not simply toggling DL on/off.

Ultrasonic wrote:

dreite wrote:

The Dirac capability consumes more resources, so the sampling rate is reduced to accommodate that.
I believe all of the miniDSP Dirac capable units operate this way.

The SHD series models are the exception. According to the product pages anyway.

I thought the SHD reduced the sampling rate as well.  But, I certainly could be wrong.  Thank you.
I don't do Dirac myself, so my comments are not based on first-hand experience.

Dave.

Did some testing and the Flex Digital always resamples whatever I throw at it to 48kHz.
This is in Device Console with Dirac off.
I don't want this, so how can I free it from the Dirac shackles?

@Karma, can you tell me what to do?

Should I run it as a DDRC unit, not in DC?
Edit: it also does only 48kHz on DDRC-24.

Jan

As mentioned above, you'll have to re-flash the unit.  If you don't have the appropriate firmware, you'll need to contact minDSP support.
Unless you really need the PEQ capability on the input channels, I would suggest not messing with it.
I don't understand why a 48khz sampling rate would not be sufficient for any audio application.

Dave.

I am a bit uncomfortable with my input at 44.1kHz from all those ripped CDs to be fractionally upsampled to 48kHz.
I'd rather leave it at 44.1kHz or move to 88.2kHz.
Do I worry unnecessarily?
But maybe going to 96kHz would not make that much difference either. 

Jan

Ah, I thought you were more interested in getting the computational power back.

Anyways, this is the nature of an asynchronous sample rate converter.
44.1 to 48 would require a goofy non-integer conversion if using a synchronous converter.

I don't think there is much to worry about here.  Some folks might point to jitter issues that previous miniDSP units exhibited, but the Flex units seem to be much better in this regard.

Dave.

Thanks Dave, that's very helpful.
Sorry to keep on coming back with these simple questions.

Jan

@jan.didden: it sounds like you already have a FLEX? If so I'd suggest you just experiment with Dirac Live and see if you like what you can achieve with it. Even if there is some very small degradation in sound quality due to the resampling you may well find that the upsides of using DIrac outweigh these anyway. 

Yes I have and I have done that some time ago. That was with full range QUAD ESL 989's, full range.
What I found with Dirac was an inproved sound field and instrument placing.

Now I am trying to upgrade to ESL63's with the Gradient sub added.

Jan