Author Topic: Room measurements and small systems  (Read 191 times)

Offline HAL

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Room measurements and small systems
« on: August 16, 2019, 07:34:04 AM »
Been working with the Raspberry Pi 4 B and have it running with Room EQ Wizard for doing room measurements.  Since REW has a RTA and FFT based analyzer and noise generator, perfect for a small measurement system.

Have the Dayton Audio USB calibrated mic here to try with the REW system.

There is a 7" touch screen here to integrate to make it all handheld, or desktop. 

A small simple system to do full room measurements.


Offline rollo

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Re: Room measurements and small systems
« Reply #1 on: August 16, 2019, 08:58:20 AM »
  Are we flat ?  :lol:

charles
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Offline HAL

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Re: Room measurements and small systems
« Reply #2 on: August 16, 2019, 09:19:47 AM »
Flatter than I can do with hours of listening in a few minutes, 

Works for me!

Offline rollo

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Re: Room measurements and small systems
« Reply #3 on: August 16, 2019, 10:19:08 AM »
Flatter than I can do with hours of listening in a few minutes, 

Works for me!


  Cool I like the idea.

charles
contact me  at rollo14@verizon.net or visit us on Facebook
Lamm - Aqua Acoustic Formula & La Scala DAC- INNUOS  - Rethm Speakers - PI Audio Uberbuss - Triode Wire Labs- Kuzma - Furutech - Audio Hungry Qualiton - Fritz Carrera speakers -Gigawatt-Arion

Offline HAL

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Re: Room measurements and small systems
« Reply #4 on: August 18, 2019, 05:42:51 AM »
Since the new dspNexus system will have an internal RPi4B running Buster for use, decided to get one to try out.  This will work with the dspMusikLCD as it exists, so also applicable to that system.  Have tried it on both the RPi3B+ and RPi4B systems and works correctly.

After loading Java 8, installed Room EQ Wizard latest beta version and everything is working correctly.  Earlier versions of Raspbian had problems with some sample rates for REW.  Buster has corrected that.

Connected the Dayton Audio UMM-6 USB mic to the RPi4B and it is running.  REW shows the mic and could load the mic calibration data.

Only thing left to try is the noise generator with the internal DAC to see if it is working.  USB DAC's externally have already worked.

Now a very small but very accurate way to measure room acoustics.



Offline HAL

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Re: Room measurements and small systems
« Reply #5 on: August 18, 2019, 10:41:50 AM »
Here is a short video of how to use the RPi4B running RoomEQWizard and Dayton Audio UMM-6 calibrated mic with the onboard stereo DAC.

https://www.youtube.com/watch?v=H3-oyXBjNyc

Offline HAL

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Re: Room measurements and small systems
« Reply #6 on: August 24, 2019, 02:14:32 AM »
Here is what the RPi4B and TRRS to RCA audio cable are for the system.

No LCD monitor installed at this point, so just using a HDMI display and USB keyboard.

The Dayton Audio UMM-6 calibrated USB mic is working with REW Beta21 and about to test the RPi4B DAC as the signal generator.