Article: Dirac Live 2 Digital Room Correction Software Walkthrough

[Ultrasonic]

On 4/14/2020 at 1:03 AM, mitchco said:

Dirac I believe is cut only filters,

 

For info. I believe Dirac Live actually applies boosts of up to 10 dB. I'm basing this on my experience of running DL on a miniDSP SHD, and using REW measurements to assess the filters applied. Specifically: making a measurement with a DL filter applied and one without, and then dividing the former by the latter to see the applied filter. It has also been observed by several miniDSP users that not allowing sufficient headroom for such boosts can lead to audible distortion, attributed to signal clipping in the digital domain. The 10 dB figure also tallies with information posted in the past by miniDSP staff.

 

It's possible that the DL behaviour is different when implemented on PC/Mac but my guess would be that the behaviour is the same.

 

@mitchco Thanks for taking the time to share your thoughts. I was interested to read your positive experiences of making measurements with furniture moved out of the way. This is not something I've tried but I will now 🙂.

[Ultrasonic]

9 hours ago, vavan said:

or even more. it reserved 12.5dB for me

 

I think the headroom to allow and the maximum boost applied at an individual frequency are slightly different things, principally because the phase changes introduced can also increase peak levels. On the other hand music signals are usually a complex mix of frequencies rather than a simple tone, so a 0 dBFS signal at the frequency of max boost would be very rare.

 

miniDSPs don't automatically 'reserve' any headroom by the way, so there is no equivalent I can give you to compare.