Room Correction Helper

Introduction

The Acoustical Correction Assistant is a tool designed to help users enhance their audio experience by correcting room acoustics. It requires Room EQ Wizard (REW) and supports importing ady files and MSO configuration. This guide will help you understand how to use the application efficiently. Basic acoustics understanding are required.

Features and Functionality

1. Import MSO Configuration into REW

• Description: Allows users to import their Multi-Sub Optimizer (MSO) configurations directly into REW to be directly integrated into the AVR, no minidsp needed.
• How to Use:
  • Export MSO: Creates a Equalizer APO export file from MSO.
  • Drop Export File: Then, drag and drop your Equalizer APO export file into the designated area.
• Requirements:
  • REW API Server: Ensure that the REW API server is running.
  • Measurement Naming: Measurements should have names starting with the same name as the configuration (.avr file).

2. Import AVR Files Generated from ODD Executable

• Description: Enables users to import AVR files generated by the ODD executable for indicating the current AVR setup.
• How to Use:
  • Download odd
  • Import AVR File
• File Details: After importing, AVR details such as list of speaker and there attended names are displayed.

3. Customization Options

• LFE Low Pass Filter (LPF) Selection: Users can select the LPF point for the LFE (Low-Frequency Effects) channel.
• Inversions and Gains Warning: A warning message alerts users that all current inversions and gains will be removed.

4. Processing and Preview Features

• Preview Options: Users can preview adjustments and view all previews.
• Measurement Display: Shows which measurements are currently displayed.

5. Multilingual Support

• The assistant supports French language, as evident from the interface labels and messages.

Getting Started

1. Download and Install REW:

   • Visit the REW (Room EQ Wizard) latest Beta page to download the latest beta version of the software.
   • Install REW on your computer following the provided instructions.

2. Download odd program:

   Download from the link according to your system:

   1. Windows
   2. Mac
   3. Linux
   • Store it to a stable location on you computer.

3. Start the REW API Server:

   • Launch REW and start the API server to enable communication with the assistant.

4. Make the measurements:

   • Use the odd program to makes the measurements, an ady file will be created. option 5 "Start built-in measurement process" (recomended method)
   • Or, use the the Audyssey mobile app to makes the measurements, then transfer the ady file to your computer.
   • Or, clear your AVR settings (odd program will do it for you) and use your own mic to makes the measurements with REW.

   AVR settings

   1. Use one way to clear actuals settings:
      1. use odd program
      2. import FLAT correction curves with MQX previously saved file
   2. Adjust volume level to 62 or -18dB (should give around 75db at Front Right)
   3. (Optionnal, depends on you preference) If you want to use Dynamic EQ. Set Audyssey Dynamic EQ ON, Set the strength of DEQ to 5dB, all other Audyssey settings off.
   4. Disable loudnees management
   5. Sub Measurements:
      1. set LFE LPF to 250hz, then use "revert AVR LPF" to cancel the filter effect
      2. Or, Assign XLR sub output to center to bypass LFE Low Pass filter
   6. Turn off ECO Mode
   7. Check :
   • all distance to 3m (do not use ‘set default’ button)
   • all levels to 0db

   REW settings

   1. Select java EXCL
   2. Sampling rate 48kHz, frequency range 0-24000Hz
   3. if you have atmos speakers you must uses dolby atmos truehd files with VLC :
      Lossless Audio Files

      • 256kMeasSweep_0_to_24000_-12_dBFS_48k_Float_R_refL.wav
      • C.mlp
      • FL.mlp
      • FR.mlp
      • SLA.mlp
      • SRA.mlp
      • SBL.mlp
      • SBR.mlp
      • TFL.mlp
      • TFR.mlp
      • TRL.mlp
      • TRR.mlp
      • BDL.mlp
      • BDR.mlp
      • FDL.mlp
      • FDR.mlp
      • FHL.mlp
      • FHR.mlp
      • FWL.mlp
      • FWR.mlp
      • RHL.mlp
      • RHR.mlp
      • SDL.mlp
      • SDR.mlp
      • SHL.mlp
      • SHR.mlp
      • TML.mlp
      • TMR.mlp
      • SWx.mlp
      • SWx_10dB_louder.mlp
   4. Acoustic Timing reference to Front Left channel (same as atmos files)
   5. Measurement loudness to -12dBFS (important for Atmos channels to play at the correct volumes)

   Measurements

   Measure each channel with the played sweeps (preferably multiple times and at multiple locations), measure MLP last and leave the mic at this position. Will be easier for further tests after calibration

5. Load your measurements:

   • If you used the odd program, you will get an ady file in the “Downloads” folder. Import it into tha main web interface. this will automatically import the measurements into REW.
   • If you made your measurement manually, generating AVR files using the ODD executable is required. drag and drop it into the designated area or click to select.

   this is how to creates the avr file:

   1. • Mac: Start Terminal.app by pressing CMD and space and then typing Terminal.app
      • Windows: open a command prompt or use the 'Menu Hepler' program
      • linux: open a shell
   2. Run the following commands, this is as examplample for mac, adapt for your system:
      1. Change Directory to your odd program folder, for exmaple:
      cd ~/Downloads
      2. List the downloaded/renamed file as a quick test:
      ls -l ./odd.*
      3. Clear the extended Attributes of the file to allow it to bypass Gatekeeper:
      xattr -c ./odd.mac
      4. Change the Mode of the file to allow it to run:
      chmod +x ./odd.mac
      5. test odd.mac to show help information. Note the dot in the front:
      /odd.mac -h
   3. search for your AVR:
   ./odd.mac search
Searching for AVRs on your network... Found 1 AVR(s) 1. Denon AVR-X3800H, AVR-X3800H, 192.168.50.225
   4. generate AVR file for your AVR:
   ./odd.mac gen
Generating .avr file... Searching for compatible AVRs... Found 1 compatible AVR(s) 1. Denon AVR-X3800H, AVR-X3800H Selected AVR #1 - Denon AVR-X3800H, AVR-X3800H, 192.168.50.225 Using title Denon_AVR-X3800H_AVR-X3800H_25-01-2025_13-49-35 Using path /Users/X/Downloads/OCA/Neuron/Denon_AVR-X3800H_AVR-X3800H_25- 01-2025_13-49-35.avr Success!

   if the receiver is not found then explicitly using its iP address may work. You can get this information by:

   1. installing the free Denon or Marantz app on your smartphone
   2. powering the AVR on
   3. in the app menu, go to Web Control -> Network -> Information and look for IP Address
   4. Note the IP address, e.g. 192.168.52.225
   5. Then use the -i parameter when using odd.mac to guide it into finding/using your AVR
   ./odd.mac gen -i 192.168.50.2.225
Generating .avr file... Querying 192.168.50.225 for AVR info
   • Use the CONNECT button to connect to the REW API server. Your measurements should be loaded into the table below.

6. Multi-Sub, Import from MSO:

   • A button can generate for you the exports of your subs measurements. this package contains right named file you can use to initialize your MSO project.
   • Once your sub configuration is finalised into MSO, use he following method to creates an export file.

   MSO does not provide exports for REW, this is a trick that is using the Equalizer APO to achieve this goal. To make the export from MSO, the related menu is available here:

   

   Then drag and drop it into the designated area or click to select.

   you have nothing to do, the import inside REW is done automatically.

   Requirements to work:

   • REW API server must be started
   • Measurement having a name beginning by the name in MSO must be loaded

   If for some reason you need to import manually, follow the instructions:

   Download files with buttons. Import can be done through the EQ window with the created file:

   

   ×

7. Review and Customize Settings:

   • Examine the file details and detected channels.
   • Customize settings such as the LFE crossover point and manage inversions and gains as needed.

8. Process and Preview Adjustments:

   • Use the preview features to get a predicted measure.

9. Upload to your AVR:

   • upload the “.oca” file generated to your AVR, your filename will be different: ./odd.mac load 20250125_1341_Sangoku_custom.oca

Conclusion

The Acoustical Correction Assistant is a comprehensive tool designed to streamline the process of acoustic correction for audio enthusiasts and professionals. By integrating with REW and providing support for various file types and configurations, it offers a versatile platform for optimizing acoustic performance.

Help

• For further assistance, refer to gihub repository issue section or contact the developer.