Welcome, Guest
Username: Password: Remember me

NOTE: This is a "Community" forum. Please be mindful that community members are here to help as part of a community effort. We therefore appreciate your effort in keeping this forum a happy place!

If you have a specific issue (e.g. hardware, failure) and want help from our support team, please use our tech support portal (Support menu - > Contact Us).
Thanks a lot of your help in making a better community.

TOPIC: Volume calibration bugs and "Low signal to noise"

Volume calibration bugs and "Low signal to noise" 4 months 4 weeks ago #47953

  • silli
  • silli's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 5
  • Thank you received: 1
  • Karma: 0
I just got a DDRC24 and I'm trying to run Dirac Live 2.5.3 with it.

Volume calibration screen seems to be really buggy. I encounter the following weirdness:

- the bar graph next to speaker level adjusters sometimes show up, sometimes not, sometimes there's a colourful scale (short horizontal lines)
- the bar graphs seem to reset to their lowest level (-72dB) whenever I switch speakers (left/right). This means that if I set Mic gain to 0% and switch speakers, I can easily get the bar graph to green by raising Mic gain. If I set it to e.g. 60%, I run out of Mic gain adjustment range and the bar graph stays below green levels.
- dB reading in speaker colums moves when I adjust Mic gain, and it goes over speaker graphics (a visual glitch)

As a result, I have no idea if my volume calibration is even in the ballpark.

This may or may not be the reason that I can't get a result other than "Signal to noise level too low" in Measure.

I've tried going through Mic gain settings in 10% increments to no avail. I've also tried several different volume levels.

Has anybody had similar problems?
Any suggestions on what I could try?

Versions:
Mac OS Mojave 10.14.6.
DDRC-24 v1.9d2
Dirac Live 2.5.3 build 399-788bba03
Last Edit: 4 months 4 weeks ago by silli.
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 4 months 4 weeks ago #47955

  • Tomas60
  • Tomas60's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 4
  • Karma: 0
try setting a new microphone calibration
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 4 months 4 weeks ago #47957

  • silli
  • silli's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 5
  • Thank you received: 1
  • Karma: 0
Thanks for the suggestion.

I downloaded the calibration files (two, regular and 90 deg) that are available from Minidsp with the mic serial. I tried them both, and then once without calibration. Same result.

Are there any other calibration files I could try?
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 4 months 4 weeks ago #47992

  • silli
  • silli's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 5
  • Thank you received: 1
  • Karma: 0
I tried older version of Dirac Live, 2.2.3. Now I get similar bugs in volume calibration, but in Measure I get "Samples lost during recording". It's the same with version 2.4.
Last Edit: 4 months 4 weeks ago by silli.
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 4 months 4 weeks ago #47998

  • Elmigu3lo
  • Elmigu3lo's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 2
  • Karma: 0
I have the same problem. Just got my unit today, installed the most recent everything and it just tells ”Low signal to noise”. Tried pretty much every possible volume/gain setting combination.

I’ll try older versions tomorrow, hopefully something will work.
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 4 months 4 weeks ago #48009

  • silli
  • silli's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 5
  • Thank you received: 1
  • Karma: 0
Older version's different error message gave me more to search with, and I found this: the software might not have access to microphone at all, due to the OS blocking it. Setting is found under System settings > Security & Privacy.

Haven't had a time to test mine yet.

Edit:
Source: www.minidsp.com/forum/shd-series/16647-e...ost-during-recording
Last Edit: 4 months 3 weeks ago by silli. Reason: Added link to source
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 4 months 4 weeks ago #48011

  • john.reekie
  • john.reekie's Avatar
  • Offline
  • Platinum Boarder
  • Posts: 3775
  • Thank you received: 1586
  • Karma: 140
I think you need to start Dirac Live separately. There was a thread about it, but basically the procedure is to click the Start Dirac Live button, then quit Dirac Live, then start it from the Finder.
I am not miniDSP support.

"You must ask the right questions." - Dr. Alfred Lanning's hologram.
-> Have you read the User Manual??
-> Have you drawn and posted a diagram?
-> Have you posted a screenshot?
-> Have you posted your config file?
The administrator has disabled public write access.
The following user(s) said Thank You: wgb113, Elmigu3lo, uwe.schmitt

Volume calibration bugs and "Low signal to noise" 4 months 4 weeks ago #48018

  • silli
  • silli's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 5
  • Thank you received: 1
  • Karma: 0
I can confirm that at least in my case, Dirac didn't have access to microphone (it was never requested). Dirac software was not found in System settings under Security & Privacy. But doing as John suggested – i.e. launching Dirac live via DDRC-24 plugin, quitting it and immediately relaunching it by launching the app directly – caused a prompt appear, asking for mic access. Having granted that, I now have Dirac live in that mic access list in Security & Privacy, and a level meter that actually reacts to sounds heard via the mic in Dirac Live.

Phew. Maybe I'll get to do my first measurement soon. About time.
The administrator has disabled public write access.
The following user(s) said Thank You: wgb113

Volume calibration bugs and "Low signal to noise" 4 months 3 weeks ago #48038

  • Elmigu3lo
  • Elmigu3lo's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 2
  • Karma: 0
Yeah, same here. Dirac didn't ask for microphone access until launching it separately. Now everything works and I got the measurements. Thank you, John!
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 2 months 1 week ago #49895

  • matthewyih
  • matthewyih's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 2
  • Karma: 0
I'm getting the same "low signal to noise level" even with unpleasant level of the sweeping sound and low level ambient sound.
It should have access to my mic because I can see it's level changing with sounds, though I didn't remember it asking for permission, restarting from folder doesn't prompt access request as well.

My unit is SHD studio
Any suggestion how to debug this? It's quite frustrating...
Last Edit: 2 months 1 week ago by matthewyih.
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 2 months 1 week ago #49907

  • devteam
  • devteam's Avatar
  • Offline
  • Administrator
  • Posts: 8761
  • Thank you received: 1149
  • Karma: 164
Hello matthewyih:

If your software is running on macOS, you can check if the Dirac Live has access permission to the microphone in "System Preferences" -> "Security & Privacy" -> select "Privacy" tab -> select "Microphone" from the left side.



If the Dirac Live app doesn't appear in the list, then it cannot access any microphone for recording, you may need to use "tccutil reset Microphone com.dirac.live" from the terminal.app (to make the Dirac Live app prompt for permission again) or if it still doesn't work, check if System Integrity Protection is enabled (by issuing "csrutil status" in the terminal.app, it should print out "enabled" by default).

If the Dirac Live app does appear in the list and you get low signal to noise level error even if you see the microphone is working in the Dirac Live app, please double check if any noise source is present in the environment that may possibly interfere with your recording task and try to eliminate it.

DevTeam
miniDSP, building a DSP community one board at a time.
The administrator has disabled public write access.

Volume calibration bugs and "Low signal to noise" 2 months 1 week ago #49923

  • dspler
  • dspler's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 4
  • Thank you received: 3
  • Karma: 0
I had the same issue today in my first Dirac 3.0.2 calibration run with my DDRC88A+BM. In my point of view the error message given by Dirac Live "Low signal-to-noise level" is too generic for one specific case which I had.

I have a 5.1 system, so 6 channels. I had kept sequence 7 and 8 as "Dirac 7" and "Dirac 8" and only set the speaker type of 7 and 8 to "Unknown".

In the calibration run, Dirac Live would then attempt to measure Dirac 7 and Dirac 8 but would come up empty, triggering the very generic "Low signal-to-noise level" error message. Not knowing the logic of the new Dirac Live, the first couple of attempts, I actually thought this is normal and I might have noise or line of sight issues or whatever and the new Dirac Live might just be more sensible to this than Dirac 1. After a number of attempts ruling out all sources of noise, I realized my error:

Sequences you do not have in your chain, you absolutely have to set to "unused" in the miniDSP plugin channel configuration. As long as the channel configuration is "Dirac x", Dirac Live will attempt to measure this and complain with said error not knowing any better.

In my point of view Dirac Live could throw a smarter error message in this case. All channels but 2 picked up something, 2 channels "Dirac 7" and "Dirac 8" recorded a flat line, no noise, nothing. In such a case a speaker misconfiguration is very likely allowing a more specific error message hint than the very generic "Low signal-to-noise level".
The administrator has disabled public write access.
The following user(s) said Thank You: DanaSampson

Volume calibration bugs and "Low signal to noise" 1 month 1 day ago #50462

  • pebecker
  • pebecker's Avatar
  • Offline
  • Fresh Boarder
  • Posts: 3
  • Karma: 0
john.reekie wrote:
I think you need to start Dirac Live separately. There was a thread about it, but basically the procedure is to click the Start Dirac Live button, then quit Dirac Live, then start it from the Finder.

This is the correct response for me for my DDRC-22D. It is a permissions issue on the microphone. So here is what I found on OSX Mojave 10.14.6......

Symptom was that I could select my UMIK-1 but it was as it it had no signal into the DiracLive application.
Going to System Preferences -> Security and Privacy -> Privacy Tab -> Microphone did NOT show DiracLive in the list.

Make sure DiracLive and the DDRC-22 control software is NOT running.
Open the DDRC-22 control software.
Click "Connect" to make sure you can actually connect to the DDRC-22.
Click "Start Dirac Live Software" from the DDRC-22 Utility.
When the DiracLive 3.0 software starts, CLOSE IT.
Now, start the DiracLive 3.0 software FROM THE FINDER UTILITY, NOT from the DDRC-22 Utility.
When the DiracLive 3.0 software starts, click on the UMIK-1.
You will be prompted by OSX, asking if you want to allow DiracLive to access your microphone. Allow it.
The microphone should now work.

If you want, navigate over to System Preferences -> Security and Privacy -> Privacy Tab -> Microphone and you should now see DiracLive in the list and it should be ticked.

NOTE: This still does not fix it for me if I launch it from DDRC-22, but this is not an issue as long as I can get a filter set.
Last Edit: 1 month 1 day ago by pebecker.
The administrator has disabled public write access.
Moderators: devteam