TOPIC:

MatteoS wrote:

False.
I asked more questions in this thread and a other customer suggested me to open a service ticket because no answers we found in your "well done" manuals.
For example: no explanation why the delay between channels is 0.7 msec at the first measurement and is different at the second, (as if it were a random number). They do not explain principles of how measurement works. It does not explain the steps. and what to try to pay attention to to have more precision. There is no technical manual, with some measure of system performance, also to help the customer understand which connections are best for the device bought.
I find the manuals graphically beautiful as superficial and missing of detailed information. Best regards.

Bear in mind that everyone posting in this thread other than @devteam are just users of miniDSP products like yourself, not employees.

Arguably its Dirac themselves who could produce a more helpful manual than miniDSP in this particular case, since your concerns relate to the Dirac software. I personally would like a better manual from Dirac since I have actually learnt more via posts from Dirac employees on forums. The video below may be of interest to you if you'd like to learn a bit more.

I'm not clear what your question is in regards to the measured time delay correcction? Provided you correctly positioned your microphone at the listening position then this is simply the correction required to time-align the first arrivals from your two speakers. If you don't move anything it shouldn't change on repeat measurements. If it does then my firs thought would be to check you aren't personally very close to the microphone when measruements are made?

Here's the video:

MatteoS wrote:

Thanks,
I thought I was careful to avoid noise during the measurement, even closed all the windows, but it is possible that some noise has entered.
I can't find an admissibility range in the manuals... Can I know what values you have in your system? To have an idea when I close a valid measure set.
Best regards.

The question above was about the signal level, not noise. Although possibly your photo was taken just before the meaningful signal was displayed.

In terms of target volume I think this is actualy something Dirac (not miniDSP) seem to have made less clear. In Dirac v2 there was a green indicator as shown in the following quick start guide (which you may find helpful as not too much has changed):

live.dirac.com/content/uploads/2019/05/d...rt-print-version.pdf

In Dirac v3 this changed to a blue band as shown in the followig link, although I have a feeling this may have gone now?

live.dirac.com/processor-step-by-step/

I typically have the microphone gain at 100%, and then adjust till the volume bar for the speakers is as pictured in the above links.

 

I've just double-checked and the current version of Dirac Live does indeed appear to have no indication of what a 'good' measurement volume is. Thisi s entirely down to Dirac and not miniDSP and I'll be honest seems decidely unhelpful. Users of older versions like me have probably just used similar levels to previously without really thinking to much of it but I can see this is not at all helpful for new users. The 'help' info. within Dirac doesn't actually help in this regard either.

The thing that I relied on was in the pop up help that says 30dB (I think) above background noise.
 

EdHowarth wrote:

The thing that I relied on was in the pop up help that says 30dB (I think) above background noise.

 

Yes but Dirac Live doesn't provide a measurement to tell you what the background noise level is. Unless I've missed it?

(Going by my own measurements in REW the noise floor varies significantly with frequency too.)