• Registered: 2024-12-15
  • Posts: 4

Topic: Room Correction with RME ADI 2???

Hey, I'm curious if I can use the DSP\EQ in this DAC to help "fix" the room? And if so, what software and hardware I would need to accomplish this, if it's even possible?

I'm currently using it to EQ my headphones but if there is greater functionality that I'm missing please let me know, I'd like to transition this RME device from my office (headphones) to my 2 channel setup in my listening room (full analogue 2 channel setup) and would love to be able to "tune" it to the room for my speakers.

Thanks!

2 Reply by KaiS (edited by KaiS 2024-12-16 00:07:33)

  • KaiS
  • DAW Mastermind
  • Online
  • From: Germany
  • Registered: 2020-02-05
  • Posts: 3,653

Re: Room Correction with RME ADI 2???

ADI-2’s EQ works great for room correction.

What you need is a measurement tool for room acoustics.

I suggest FFT from Andrew Smith, out of the Audio Tools suite, for iDevice.
https://apps.apple.com/de/app/fft/id298840058

For just 12 bucks it turns an iDevice into a calibrated, full fledged measurement system.

KaiS's Website

  • Registered: 2024-12-15
  • Posts: 4

Re: Room Correction with RME ADI 2???

So what I struggle with, is how to interpret the data into actionable items in the device itself, I haven't found anything online describing this process.

Does the software provide me with like....a frequency curve that would "counteract" the "bad" bits and correct them? If so, how can I translate that data into specific setting numbers to change on the RME?

4 Reply by KaiS (edited by KaiS 2024-12-16 00:36:04)

  • KaiS
  • DAW Mastermind
  • Online
  • From: Germany
  • Registered: 2020-02-05
  • Posts: 3,653

Re: Room Correction with RME ADI 2???

It’s a visual and interactive process, very straight forward.
You flatten the displayed curve by setting an inverted EQ curve, while seeing the resulting changes in realtime.

If you decide to get AudioTools I can give you a tutorial.


There are other apps like REW that deliver EQ settings, but these need an invest into a measurement mic, and some time to learn how to use them.

KaiS's Website

  • From: Milan, Italy
  • Registered: 2012-02-19
  • Posts: 226

Re: Room Correction with RME ADI 2???

KaiS wrote:

ADI-2’s EQ works great for room correction.

What you need is a measurement tool for room acoustics.

I suggest FFT from Andrew Smith, out of the Audio Tools suite, for iDevice.
https://apps.apple.com/de/app/fft/id298840058

For just 12 bucks it turns an iDevice into a calibrated, full fledged measurement system.

I have the ADI Pro 2/4 and have been wondering what the best way to measure my room was recently. I'd love to see you write clear instructions for how to measure with this FFT app, if you ever have the time @KaiS

Is it as easy as sending pink noise through your monitors, placing the iPhone with this app in the listening position, saving the resulting FFT graph, then applying a smoothed "reverse" EQ curve to your monitoring with the RME EQ?

https://musicwall.app/hermetech

Babaluma's Website

6 Reply by KaiS (edited by KaiS 2024-12-28 20:34:01)

  • KaiS
  • DAW Mastermind
  • Online
  • From: Germany
  • Registered: 2020-02-05
  • Posts: 3,653

Re: Room Correction with RME ADI 2???

Babaluma wrote:
KaiS wrote:

ADI-2’s EQ works great for room correction.

What you need is a measurement tool for room acoustics.

I suggest FFT from Andrew Smith, out of the Audio Tools suite, for iDevice.
https://apps.apple.com/de/app/fft/id298840058

For just 12 bucks it turns an iDevice into a calibrated, full fledged measurement system.

I have the ADI Pro 2/4 and have been wondering what the best way to measure my room was recently. I'd love to see you write clear instructions for how to measure with this FFT app, if you ever have the time @KaiS

Is it as easy as sending pink noise through your monitors, placing the iPhone with this app in the listening position, saving the resulting FFT graph, then applying a smoothed "reverse" EQ curve to your monitoring with the RME EQ?

Look here for a basic measurement instruction, in the context of subwoofer integration:

https://forum.rme-audio.de/viewtopic.ph … 12#p155312


To do a measurement needs to define a goal in the first place:

• Linearizing a full range speaker is done in the nearfield of the speaker, 50-100 cm distance on listening axis, equidistant between tweeter and midrange driver, to exclude wall/room reflections.

• Improving the room response only works in the low frequency range, up to ca. 250 Hz.
This is done with the measurement mic at the listening position.

• Same for integration of a sub.


Why is that:
A measurement mic does NOT differentiate between direct and wall reflected sounds.
The human auditorial system DOES, the direct sound from the speaker largely dominates the reception, room sounds are kind of “excluded” subjectively.
Only at low frequencies this mechanism’s efficiency is reduced.

In typical domestic rooms the direct/reflected ration reaches 50:50% (the “reverberation radius”) at a distance of 50-100 cm from the source.
To mostly look at the source, not the room, you have to measure that close to a speaker.


• Typical settings for FFT app:
(Not mentioned parameters should stay at default)

FFT Settings (wrench symbol):
FFT Size: Equal Points / Octave EPPO
dB Range for 1 dB Scale: 30 dB
Advanced:FFT Settings: Blackman: Overlap 90%

Graph settings:
Graph Smoothing 1/3 Octave
Graph Decay 8s Decay, or Average (for precise results an 20-30s run can be averaged, needs a restart for each run)

KaiS's Website

7 Reply by johny_2000 (edited by johny_2000 2024-12-28 23:41:52)

  • From: United States
  • Registered: 2024-03-15
  • Posts: 95

Re: Room Correction with RME ADI 2???

KaiS wrote:

There are other apps like REW that deliver EQ settings, but these need an invest into a measurement mic, and some time to learn how to use them.

I like it better this way. The Moving Microphone Method is my choice.
REW software + MiniDSP UMIK-2 USB measurement microphone (supplied with individual calibration files).

  • From: Milan, Italy
  • Registered: 2012-02-19
  • Posts: 226

Re: Room Correction with RME ADI 2???

KaiS wrote:

To do a measurement needs to define a goal in the first place:

• Improving the room response only works in the low frequency range, up to ca. 250 Hz.
This is done with the measurement mic at the listening position.

Thank you for this! I'm happy with he speaker's response (ATCs), it's the room I want to measure and hopefully improve a bit (even if only below 250Hz), so will buy the Audiotools set and give it a go in the new year.

Would it also be possible to do it without the iPhone + app and just use a good omni measurement mic at the listening position, pink noise to the monitors, then RME EQ to flat while watching the mic return into a high quality FFT on the main screen/PC/DAW?

https://musicwall.app/hermetech

Babaluma's Website

9 Reply by KaiS (edited by KaiS 2024-12-29 14:29:58)

  • KaiS
  • DAW Mastermind
  • Online
  • From: Germany
  • Registered: 2020-02-05
  • Posts: 3,653

Re: Room Correction with RME ADI 2???

Babaluma wrote:

Would it also be possible to do it without the iPhone + app and just use a good omni measurement mic at the listening position, pink noise to the monitors, then RME EQ to flat while watching the mic return into a high quality FFT on the main screen/PC/DAW?

Any FFT analyzer that has high enough low frequency resolution and long enough averaging for a stable display, like REW can be used.

One that doesn’t work well is RME‘s DigiCheck, which is centered around displaying music spectra, not acoustics measurements, a bit similar to ADI-2 built-in‘s.

And of course there are hundreds of toy analyzer apps that are just fun, but don‘t give any useful information.


The FFT app by Andrew Smith is special.

For just 12 bucks it has calibration files for all existing iDevice’s mics built in, and accesses the iDevice’s microphone in the so called iOS “measurement mode” that gives unprocessed access to the mic for precise results.

It’s the only app that offers the (Equal Points Per Octave-) EPPO-resolution, an FFT method that offers good low frequency resolution without the need for an FFT size of 64k or more.
Only my 100k-bucks Bruel&Kjaer hardware analyzer can do that.

FFT (and the complete AudioTools suite) is the only professional measurement app on iDevice I know, other than the very expensive Faber Acoustical LLC “Signal Scope” app series.

KaiS's Website

  • From: Milan, Italy
  • Registered: 2012-02-19
  • Posts: 226

Re: Room Correction with RME ADI 2???

Thanks, I might try and give it a go without the app first then. I'd be using a pretty flat, very low noise AT 4022 omni mic, which I'm sure would be better than most cheaper measurement mics, and a super flat and low noise Elysia Skulptur preamp. I can easily generate the pink noise to the ATCs, and I'd use either Voxengo Span Plus or TDR Prism as the analyser.

Audiotools does look great though (and only twice the price of the FFT by itself, for way more tools), so will keep studying their website, loads of great info there!

https://musicwall.app/hermetech

Babaluma's Website

11 Reply by Muffin (edited by Muffin 2024-12-29 15:30:51)

  • Muffin
  • S/Mux specialist
  • Offline
  • Registered: 2021-12-26
  • Posts: 227

Re: Room Correction with RME ADI 2???

KaiS wrote:
Babaluma wrote:

Would it also be possible to do it without the iPhone + app and just use a good omni measurement mic at the listening position, pink noise to the monitors, then RME EQ to flat while watching the mic return into a high quality FFT on the main screen/PC/DAW?

Any FFT analyzer that has high enough low frequency resolution and long enough averaging for a stable display, like REW can be used.

One that doesn’t work well is RME‘s DigiCheck, which is centered around displaying music spectra, not acoustics measurements, a bit similar to ADI-2 built-in‘s.

And of course there are hundreds of toy analyzer apps that are just fun, but don‘t give any useful information.


The FFT app by Andrew Smith is special.

For just 12 bucks it has calibration files for all existing iDevice’s mics built in, and accesses the iDevice’s microphone in the so called iOS “measurement mode” that gives unprocessed access to the mic for precise results.

It’s the only app that offers the (Equal Points Per Octave-) EPPO-resolution, an FFT method that offers good low frequency resolution without the need for an FFT size of 64k or more.
Only my 100k-bucks Bruel&Kjaer hardware analyzer can do that.

FFT (and the complete AudioTools suite) is the only professional measurement app on iDevice I know, other than the very expensive Faber Acoustical LLC “Signal Scope” app series.

Thank you for the information about this app by Andrew Smith.

  • Registered: 2022-07-20
  • Posts: 22

Re: Room Correction with RME ADI 2???

Another suggestion, free :
https://www.loudspeakers.audio/en/
Happy new year,