A Windows distribution of this project is available here: https://sourceforge.net/projects/ash-toolset/

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Table of Contents

1. Features
2. Background
3. Getting Started
4. Usage
5. Supporting Information
6. License
7. Contact
8. Acknowledgments

ASH Toolset

The Audio Spatialisation for Headphones Toolset is a set of tools for headphone correction and binaural synthesis of spatial audio systems on headphones

Features

• Headphone Correction — Generate headphone correction filters in WAV format for IR convolution or as configurations for graphic equalisers.
• Binaural Room Simulation — Generate customised binaural simulations of different acoustic environments including control rooms, studios, halls, and more. Resulting filters can be saved in WAV format or SOFA format for IR convolution.
• Equalizer APO Integration — Auto configures Equalizer APO to apply created filters and perform headphone correction and binaural room simulation.
• HeSuVi Compatibility — Generates filters in formats compatible with HeSuVi, a headphone surround virtualization tool for Equalizer APO.
• SOFA Format Compatibility - Load HRTF datasets and export customised binaural responses in SOFA format

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Background

Binaural Room Impulse Responses

Binaural room impulse responses (BRIRs) are measurements that capture the spectral filtering properties of the head and ears, as well as the loudspeakers and any room reverberation present. Measurements are typically made in reverberant rooms using dummy heads that are rotated above their torso to capture multiple head orientations for a number of source locations within the room. One key application of BRIRs is the synthesis of spatial audio over headphones. Convolution of an audio signal with a BRIR converts the audio to that which would be heard by the listener if it had been played at the source location. This process can be repeated for all channels in the audio signal and their respective source locations in the room to create spatial surround sound on headphones.

The ASH Toolset can be used to generate and apply sets of BRIRs that can be customised to achieve a desired acoustic simulation over headphones. Distance, acoustic environment, listener, headphone type and room target response can be customised to the user's preference.

Headphone Correction Filters

A significant source of spectral colouration impacting the quality of binaural simulations is the headphones used for binaural reproduction. A common design goal for headphone calibration is the diffuse-field target which minimises spectral colouration of stereo signals on headphones. Binaural measurements that have been diffuse-field calibrated will be compatible with these types of headphones. As the binaural responses produced by the toolset are diffuse-field calibrated (prior to applying room targets), headphones should also be diffuse-field equalised to ensure compatibility in terms of timbral quality.

Although diffuse-field calibrated headphones are common, differences in frequency responses across headphones are considerably large. Individual headphone equalisation is therefore recommended to compensate for the unique and undesired spectral colouration introduced by the listener's headphones.

The ASH Toolset can be used to generate and apply Headphone Correction Filters (HpCFs) for a wide range of headphones. The filters can be used to equalise individual headphones to the diffuse-field target response and remove undesired spectral colouration introduced by the headphones.

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Getting Started

ASH Toolset is a python app built with Python, Numpy, Scipy, & DearPyGui.
Developed on Python 3.11.7.
Tested on Windows 10 and Windows 11 with Equalizer APO 1.4 and Voicemeeter 1.1.1.8

Prerequisites

Python libraries:

pip install dearpygui==2.0.0
pip install dearpygui-ext==2.0.0
pip install dearpygui-extend==0.1.5
pip install mat73==0.63
pip install matplotlib==3.7.0
pip install numpy==2.2.4
pip install pandas==2.2.3
pip install pyfar==0.6.5
pip install scipy==1.11.4
pip install soundfile==0.12.1
pip install gdown==5.2.0
pip install librosa==0.10.2.post1
pip install thefuzz==0.22.1
pip install fuzzywuzzy==0.18.0
pip install SOFASonix==1.0.7
pip install sofar==1.2.1
pip install h5py==3.11.0
pip install noisereduce==3.0.2
pip install Requests==2.32.3

Data files:

HRIR, BRIR and filter datasets are required in the data folder for the app to run. Due to large file sizes the data files are stored in google drive.
Link to data folder

Optional:

• Equalizer APO, an audio processing object for windows featuring IR convolution and Graphic EQ capabilities.
• HeSuVi, a headphone surround virtualization tool for Equalizer APO.

Installation

1. Clone the repo
2. Download the data folder from google drive (Link to data folder)
3. Extract data folder to ASH-Toolset root folder. The folder hierarchy will be 'ASH-Toolset/data'.
4. (optional) If using Equalizer APO for the first time, download Equalizer APO and follow the Equalizer APO installation tutorial.

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Usage

Run the ash_toolset.py using python to launch the GUI

python C:\sample-location\ASH-Toolset\ash_toolset.py

GUI Overview

The app contains the following 3 tabs:

• The 'Quick Configuration’ tab can be used to directly apply headphone correction and binaural room simulation in Equalizer APO
• The ‘Filter & Dataset export’ tab can be used to export correction filters and binaural datasets to a local directory
• The ‘Additional Tools & Settings’ tab contains some miscellaneous options and log messages

Headphone Correction

In the 'Quick Configuration’ tab, this tool is used to apply headphone correction in Equalizer APO. In the ‘Filter & Dataset export’ tab, this is used to export a set of correction filter files for a specific headphone which can then be loaded into audio processing software to apply headphone correction.

1. Select a headphone brand to filter down on the headphone list.
2. Select a specific headphone.
3. Select a specific sample. Note that in the ‘Filter & Dataset export’ tab, all samples will be exported for the selected headphone.
4. (‘Filter & Dataset export’ tab only) Select which files to include in the export.
   • FIR Filters: Minimum phase FIRs in WAV format for convolution. 1 channel at specified sample rate and bit depth. This is filter type is required for the app to auto-configure 'config.txt' in Equalizer APO.
   • Stereo FIR Filters: Minimum phase FIRs in WAV format for convolution. 2 channels at specified sample rate and bit depth.
   • E-APO Configuration files: configuration files that can be loaded into Equalizer APO to perform convolution with the FIR filters. This feature is deprecated from V2.0.0 onwards due to inclusion of auto-configure 'config.txt' feature.
   • Graphic EQ Filters (127 bands): Graphic EQ configurations with 127 bands. Compatible with Equalizer APO and Wavelet
   • Graphic EQ Filters (31 bands): Graphic EQ configurations with 31 bands. Compatible with 31 band graphic equalizers including Equalizer APO
   • HeSuVi Filters: Graphic EQ configurations with 127 bands. Compatible with HeSuVi. Saved in HeSuVi\eq folder
5. Select a sample rate for the WAV files. Available options are 44.1kHz, 48kHz, and 96kHz. Note: The sample rate of the generated fitlers should match the sample rate of the sound device.
6. Select a bit depth for the WAV files. Available options are 24 bits per sample and 32 bits per sample.
7. Click the 'Apply Selection' button to apply the selected filter in Equalizer APO or click the 'Process' button to export the selected filters to the output directory. By default this location will be C:\Program Files\EqualizerAPO\config\ASH-Outputs but can be changed using the change folder option.

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Binaural Room Simulation over Headphones

Quick Configuration

In the 'Quick Configuration’ tab, this tool is used to apply customised binaural room simulations over headphones in equalizer APO.

1. Select Acoustic Space from a range of environments including audio labs, conference rooms, control rooms, seminar rooms, studios, and more. This will determine the listening environment of the simulation.
2. Select Gain for Direct Sound in dB. Select a value between -10dB and 10dB. Higher values will result in lower perceived distance. Lower values result in higher perceived distance
3. Select Room Target from a range of options including flat, ASH target, Harman target, and more. This will influence the overall balance of low and high frequencies. Flat is recommended if using headphone correction from other sources such as AutoEq. Variations of below targets with flat mid and high frequencies are also provided.
4. Select Headphone Compensation from below options. The selected option should match the listener's headphone type. High strength is selected by default. Reduce to low strength if sound localisation or timbre is compromised.
   • In-Ear Headphones, high strength
   • In-Ear Headphones, low strength
   • Over-Ear/On-Ear Headphones, high strength
   • Over-Ear/On-Ear Headphones, low strength
5. Select Listener Type from below options.
   • Dummy Head / Head & Torso Simulator
   • Human Listener
   • User SOFA Input
6. Select Dataset from available options. A number of public HRTF datasets will be listed here if ‘Listener Type’ is set to 'Dummy Head / Head & Torso Simulator' or 'Human Listener'.
7. Select Listener from available options. Some options will require an internet connection as the source dataset is not included and will be automatically downloaded from the web. If ‘Listener Type’ is set to ‘User SOFA Input’, user SOFA files will be automatically listed here. User SOFA files must be placed in the user data folder which is usually located at C:\Program Files (x86)\ASH Toolset\_internal\data\user\SOFA. Additional SOFA files can be found at the SOFA conventions repository.
8. (optional) Select Low-frequency Integration Crossover Frequency between 20Hz and 150Hz. Auto Select mode will select an optimal frequency for the selected acoustic space. This can be used to tune the integration of the cleaner Low-frequency response and original room response. Higher values may result in a smoother bass response.
9. Select Low-frequency Response for Extension from available options. A comparison of responses are available in the supporting information section below.
10. (optional) Enable Additional EQ. Compensate Headphone Roll-off option will compensate the typical reduction in bass response below 100Hz in many headphones. This filter will result in a gain of approximately 4dB at 20Hz. Forward-Backward Filtering option will eliminate delay introduced by the filters, however can introduce edge artefacts in some cases.
11. Select Sample Rate for the WAV files. Available options are 44.1kHz, 48kHz, and 96kHz. Note: The sample rate of the generated WAV files should match the sample rate of the sound device.
12. Select Bit Depth for the WAV files. Available options are 24 bits per sample and 32 bits per sample.
13. Click the 'Apply Parameters' button to apply the binaural simulation in Equalizer APO.

Filter & Dataset export

In the ‘Filter & Dataset export’ tab, this is used to export a customised binaural dataset containing binaural impulse responses in WAV or SOFA format which can then be loaded into audio processing software to apply room simulation.

1. Select Acoustic Space from a range of environments including audio labs, conference rooms, control rooms, seminar rooms, studios, and more. This will determine the listening environment of the simulation.
2. Select Gain for Direct Sound in dB. Select a value between -10dB and 10dB. Higher values will result in lower perceived distance. Lower values result in higher perceived distance
3. Select Room Target from a range of options including flat, ASH target, Harman target, and more. This will influence the overall balance of low and high frequencies. Flat is recommended if using headphone correction from other sources such as AutoEq. Variations of below targets with flat mid and high frequencies are also provided.
4. Select Headphone Compensation from below options. The selected option should match the listener's headphone type. High strength is selected by default. Reduce to low strength if sound localisation or timbre is compromised.
   • In-Ear Headphones, high strength
   • In-Ear Headphones, low strength
   • Over-Ear/On-Ear Headphones, high strength
   • Over-Ear/On-Ear Headphones, low strength
5. Select Spatial Resolution from below options. Increasing resolution will increase number of source directions available but will also increase processing time and dataset size. Low' is recommended unless additional directions or SOFA export is required.
   • Low: Elevation angles ranging from -30 to 30 degrees in 15 degree steps. Azimuth angles ranging from 0 to 360 degrees in varying steps.
   • Medium: Elevation angles ranging from -45 to 45 degrees in 15 degree steps. Azimuth angles ranging from 0 to 360 degrees in varying steps.
   • High: Elevation angles ranging from -50 to 50 degrees (WAV export) or -60 to 60 degrees (SOFA export) in 5 degree steps. Azimuth angles ranging from 0 to 360 degrees in 5 degree steps.
   • Max: Elevation angles ranging from -40 to 40 degrees (WAV export) or -40 to 60 degrees (SOFA export) in 2 degree steps. Azimuth angles ranging from 0 to 360 degrees in 2 degree steps.
6. Select Listener Type from below options.
   • Dummy Head / Head & Torso Simulator
   • Human Listener
   • User SOFA Input
7. Select Dataset from available options. A number of public HRTF datasets will be listed here if ‘Listener Type’ is set to 'Dummy Head / Head & Torso Simulator' or 'Human Listener'.
8. Select Listener from available options. Some options will require an internet connection as the source dataset is not included and will be automatically downloaded from the web. If ‘Listener Type’ is set to ‘User SOFA Input’, user SOFA files will be automatically listed here. User SOFA files must be placed in the user data folder which is usually located at C:\Program Files (x86)\ASH Toolset\_internal\data\user\SOFA. Additional SOFA files can be found at the SOFA conventions repository.
9. (optional) Select Low-frequency Integration Crossover Frequency between 20Hz and 150Hz. Auto Select mode will select an optimal frequency for the selected acoustic space. This can be used to tune the integration of the cleaner Low-frequency response and original room response. Higher values may result in a smoother bass response.
10. Select Low-frequency Response for Extension from available options. A comparison of responses are available in the supporting information section below.
11. (optional) Enable Additional EQ. Compensate Headphone Roll-off option will compensate the typical reduction in bass response below 100Hz in many headphones. This filter will result in a gain of approximately 4dB at 20Hz. Forward-Backward Filtering option will eliminate delay introduced by the filters, however can introduce edge artefacts in some cases.
12. Select Sample Rate for the WAV or SOFA files. Available options are 44.1kHz, 48kHz, and 96kHz. Note: The sample rate of the generated WAV files should match the sample rate of the sound device.
13. Select Bit Depth for the WAV files. Available options are 24 bits per sample and 32 bits per sample.
14. Select which files to include in the export.
    • Direction specific WAV BRIRs: Binaural Room Impulse Responses (BRIRs) in WAV format for convolution. One file for each source direction and 2 channels per file at specified sample rate and bit depth. This is file type is required for the app to auto-configure 'config.txt' in Equalizer APO.
    • True Stereo WAV BRIRs: True Stereo BRIR in WAV format for convolution. One file with 4 channels representing L and R speakers (LL LR RL RR) at specified sample rate and bit depth.
    • HeSuVi WAV BRIRs: BRIRs in HeSuVi compatible WAV format. 14 channels, 24 or 32 bit depth, 44.1Khz and 48Khz. The directions of the channels can be configured in the 'HeSuVi Channel Configuration' tab on the right.
    • E-APO Configuration Files: configuration files that can be loaded into Equalizer APO to perform convolution with BRIRs. This feature is deprecated from V2.0.0 onwards due to inclusion of auto-configure 'config.txt' feature.
    • SOFA File: BRIR dataset file in SOFA (Spatially Oriented Format for Acoustics) format. The SOFA convention can be selected in the Misc. Settings section under 'Additional Tools & Settings' tab.
15. Click the 'Process' button to export the binaural dataset to the output directory.

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Using the Correction Filters and Binaural Simulations

The outputs can be used to create spatial surround sound on headphones by convolving an audio stream with a set of binaural impulse responses and a headphone correction filter. This requires IR Convolution software that supports stereo or true stereo processing such as Equalizer APO

Apply Filters and Simulations in Equalizer APO (new method)

V3.0.0 onwards of the toolset includes a 'Quick Configuration’ tab which will auto-configure 'config.txt' to apply selected filters and binaural simulations in Equalizer APO. Ensure 'Enable Headphone Correction' and/or 'Enable Binaural Room Simulation' are ticked for the changes to apply. The audio channels can be configured in the 'Channel Configuration' tab on the right side of the app.

• The preamplification control will apply the specified gain to all channels. An option to auto-adjust preamp has been included from V3.1.0 onwards. This option can be set to prevent all clipping, or align levels in low or mid frequencies which will keep levels consistent while comparing different simulations.
• The estimated peak gain table can be used to identify potential clipping that may occur for different input channel configurations. Max. peak gain is the highest peak gain across the left and right channels whereas average peak gain is the average peak gain of the left and right channels.
• The input audio channel configuration can be selected using the drop down. The selected channel configuration must be supported by the sound device. An option to upmix 2.0 stereo to 7.1 is included. The upmix has available 2 methods: Method A which is a simple channel duplication and Method B which also includes Mid/Side channel separation.
• The gains and source directions of each audio channel can be configured separately.

Apply Filters and Simulations in Equalizer APO (old method - V2.0.0 to V2.4.0)

V2.0.0 to V2.4.0 of the toolset includes a section to browse exported filters and auto-configure 'config.txt' to apply selected filters in Equalizer APO. This method removes the need for manual interaction with the configuration editor.

1. Select a headphone from the list of exported filters.
2. Select a specific sample to apply headphone correction.
3. Select a binaural dataset from list of generated datasets to apply binaural room simulation.
4. Select audio channel configuration. The selected channel configuration must be supported by the sound device.
5. Configure the gain and source direction of each audio channel.

Apply Filters and Simulations in Equalizer APO (old method - V1.0.0 to V1.2.0)

1. In the Windows sound settings, set the default format of the output sound device to the sample rate of the generated filters. In Windows 11 the playback device settings can be found in Settings -> System -> Sound -> (your output device) -> Properties. The sample rate of the sound device must match the sample rate of the filters.
2. Generated filters will be saved in the Equalizer APO config directory (e.g. C:\Program Files\EqualizerAPO\config\ASH-Outputs) by default. Move the ASH-Outputs folder to this location if it was saved elsewhere.
3. In the configuration editor, add a new Include command to your config.txt file, then navigate to the EqualizerAPO\config\ASH-Outputs\E-APO-Configs\HpCF-Convolution folder and select the desired configuration file for headphone correction.
4. In the configuration editor, add a new Include command to your config.txt file, then navigate to the EqualizerAPO\config\ASH-Outputs\E-APO-Configs\BRIR-Convolution folder and select the desired configuration file for binaural room simulation.
5. To swap out a filter or binaural dataset, simply load a different configuration file.

7.1 Surround Virtualisation

If your audio device does not support a 7.1 surround channel configuration, a virtual audio device such as VB-Audio Virtual Cable or Voicemeeter can be used for audio processing in place of your regular audio playback device. Equalizer APO can be installed on the virtual audio device which can be configured for 7.1 audio, and the output of the virtual audio device can be sent to your regular audio playback device.

Apply Filters and Simulations in HeSuVi

As an alternative to above method in Equalizer APO, the generated filters can be applied using HeSuVi.

1. If using HeSuVi for the first time, download HeSuVi and follow the installation and usage steps outlined in the HeSuVi Wiki.
2. Open or restart HeSuVi
3. The binaural room simulations can be selected in the Virtualisation tab. The simulation can be found under the Common HRIRs section at the top of the list.
4. The headphone correction filters can be selected in the Equalizer tab. The filters can be found under _HpCFs at the bottom of the list.

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Acoustic Space Import

This tab can be used to generate new acoustic spaces from reverberant impulse response (IR) files such as room impulse responses (RIRs). Imported acoustic spaces can be used in the quick configuration and filter & dataset export tabs.

Set IR Folder

• To prepare new inputs, click “Open Input Folder” to open the directory where IR folders should be stored.
  • Ensure all IR files for one space are grouped into a single subfolder (e.g., Room A).
  • Supported file types: .wav, .sofa, .mat, .npy, .hdf5
• Click “Refresh Folder List” to load available IR folders if new folder was created.
• Select a folder from the IR Folder List dropdown.

Enter Metadata (Optional)

• Name: Enter a name for the acoustic space. If left blank, the folder name will be used.
• Description: Enter a brief description of the space.

IR Processing Options

• Long Reverb Tail Mode:
  Enable if IRs have long decay tails (over 1.5 seconds). This increases processing time.
• Noise Reduction:
  Enable if IRs contain a high noise floor.
• Low-frequency Mode:
  Enable if the IRs are low frequency measurements such as subwoofer measurements. This will make the result available under Low-frequency responses.
• Rise Time (ms):
  Select the duration of the fade in window applied to the response.

Spatial Sampling

• Desired Directions:
  Specify the number of simulated source directions to generate.
  • Minimum: 1000, Maximum: 3000 (default: 1750)
  • Lower values will reduce processing time.
• Alignment Frequency (Hz):
  Set the cutoff frequency for time-domain alignment.
  • Minimum: 50, Maximum: 150 (default: 110)

Pitch Shifting (for dataset expansion)

The below parameters are only used to expand the dataset with new simulated source directions in cases where few IRs are supplied

• Pitch Shift Range:
  • Low: Minimum pitch shift in semitones. (default: 0.0)
  • High: Maximum pitch shift in semitones. (default: 24.0)
• Pitch Shift Compensation:
  Enable to correct frequency response of pitch-shifted IRs. May introduce artifacts.

Start Processing

• Click “Start Processing” to begin.
  • Processing may take several minutes depending on the dataset and settings.

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Room Target Generator

This tab can be used to create custom room target curves using low-shelf and high-shelf filters. These targets can be used later in quick configuration and dataset export.

Enter Target Name (Optional)

• Name: Provide a name for your new room target.
  • If left blank, a name will be auto-generated based on the filter parameters.

Configure Low-Shelf Filter

• Frequency (Hz):
  Set the cutoff frequency for the low-shelf filter.
  • Range: 20–1000 Hz (default: 100 Hz)
• Gain (dB):
  Set the gain.
  • Negative values attenuate low frequencies.
  • Range: -6.0 to 18.0 dB (default: 6.0 dB)
• Q-Factor:
  Controls the slope of the filter.
  • Lower values = broader curve.
  • Range: 0.1 to 5.0 (default: 0.707)

Configure High-Shelf Filter

• Frequency (Hz):
  Set the cutoff frequency for the high-shelf filter.
  • Range: 1000–20000 Hz (default: 7000 Hz)
• Gain (dB):
  Set the gain.
  • Positive values boost high frequencies.
  • Range: -18.0 to 6.0 dB (default: -4.0 dB)
• Q-Factor:
  Controls the slope of the filter.
  • Lower values = broader curve.
  • Range: 0.1 to 5.0 (default: 0.4)

Generate the Room Target

• The Room Target Name will be displayed below if entered.
• Click “Generate Target” to apply your filter settings.
  • The new target will be saved and made available in the Quick Config and Dataset Export tabs.

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File Naming and Structure

Outputs (excluding HeSuVi files) are saved within the ASH-Outputs child folder under the output directory. This will be in the Equalizer APO config directory (e.g. C:\Program Files\EqualizerAPO\config\ASH-Outputs) by default. HeSuVi files will be saved within the HeSuVi folder (e.g. C:\Program Files\EqualizerAPO\config\HeSuVi) by default. If required, the output directory can be changed using the directory selector. The EqualizerAPO\config directory should be selected if using Equalizer APO to ensure the filters and configurations can be read by Equalizer APO.

Binaural Room Impulse Responses

• Binaural room impulse responses are saved within the ASH-Outputs\BRIRs folder.
• A folder is created for each set of WAV BRIRs and is named as per the selected parameters.
  • The naming convention for the folder is (Listener)_(Acoustic_Space)_(Direct_Sound_Gain)_(Room_Target)_(Low-Freq_Response)_(Headphone_Type).
• A WAV file is created for a range of source directions around the listener. Each WAV file corresponds to a unique direction.
  • The naming convention for the BRIR WAV files is BRIR_E(Elevation)_A(Azimuth).wav.
  • Positive elevation angles correspond to points above the listener while negative angles correspond to points below the listener. An elevation of 0 corresponds to a point at the same level as the listener.
  • Positive azimuth angles correspond to points to the right of the listener while negative angles correspond to points to the left of the listener. An azimuth of -90 corresponds to a point directly to the left of the listener while an azimuth of 90 corresponds to a point directly to the right of the listener.
• A true stereo WAV file is also located in each folder with naming BRIR_True_Stereo.wav
• SOFA files are located under the SOFA folder

Headphone Correction Filters

• Correction filters are saved within the ASH-Outputs\HpCFs folder
• A folder is created for each filter type and for each headphone brand that has an exported filter
• The filters are named as per the headphone name

Equalizer APO Configurations (deprecated)

• Equalizer APO configurations are saved within the ASH-Outputs\E-APO-Configs folder
• Folders follow the same naming as above filters and binaural datasets
• A set of IR convolution configuration files are created for each binaural dataset and for a range of common speaker configurations including Stereo, 5.1 surround, & 7.1 surround.
• A set of IR convolution configuration files are created for each headphone correction filter

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Supporting Information

Supported SOFA Conventions

Convention	Version	SOFAConventionsVersion	Read	Write
GeneralFIR	2.1	1	Yes	No
GeneralFIR	1	1	Yes	Yes
SimpleFreeFieldHRIR	2.1	1	Yes	No
SimpleFreeFieldHRIR	1	1	Yes	Yes
SimpleFreeFieldHRIR	0.6	0.4	Yes	No
SimpleFreeFieldHRIR	0.5	0.3	Yes	No
GeneralFIRE	1	1	Yes	No
GeneralFIRE	0.6	0.1	Yes	No
GeneralFIR-E	2.1	2	Yes	No
FreeFieldHRIR	2.1	1	Yes	No

Acoustic Spaces

Name	Estimated RT60 (ms)	Name	Estimated RT60 (ms)	Name	Estimated RT60 (ms)
Atrium A	2894	Conference Room	467	Outdoors B	1183
Atrium B	1243	Control Room	260	Outdoors C	1312
Audio Lab A	305	Courtyard	1375	Recording Room	275
Audio Lab B	413	Foyer	1213	Seminar Room A	839
Audio Lab C	508	Hall A	1418	Seminar Room B	710
Audio Lab D	193	Hall B	929	Seminar Room C	705
Audio Lab E	442	Hall C	719	Seminar Room D	685
Audio Lab F	631	Hall D	1118	Small Room A	500
Audio Lab G	360	Hall E	1405	Small Room B	437
Audio Lab H	528	Kiln	780	Small Room C	467
Audio Lab I	539	Large Room A	624	Small Room D	463
Auditorium A	1455	Large Room B	576	Small Room E	476
Auditorium B	901	Lecture Room	704	Small Room F	474
Auditorium C	431	Listening Room A	221	Small Theatre	1019
Auditorium D	1246	Listening Room B	379	Smoking Room	646
Broadcast Studio A	1183	Listening Room C	562	Studio A	398
Broadcast Studio B	1241	Listening Room D	312	Studio B	351
Chamber A	1477	Listening Room E	824	Studio C	723
Chamber B	811	Listening Room F	771	Studio D	739
Classroom	964	Listening Room G	233	Tatami Room	513
Concert Hall A	1599	Lobby	778	Tennis Court	1415
Concert Hall B	1565	Office A	408	Theatre	889
Concert Hall C	1493	Office B	496	Tunnel	1354
Concert Hall D	1417	Outdoors A	1935

Low-frequency Responses

Name	Acoustic space	Estimated rt60	Comments	Frequency Range	Tolerance	Measurement Dataset	Source Type	Listener Type
Low-frequency Response A	Audio Lab	320	Primary response used in v3.1.2	3Hz-150Hz	20Hz-120Hz +/-0.8dB	Derived from multiple RIR Datasets	Mixed	Binaural
Low-frequency Response B	Audio Lab	340	Newly added in v3.2.0	0Hz-150Hz	20Hz-120Hz +/-1.0dB	Derived from multiple RIR Datasets	Mixed	Binaural
Low-frequency Response C	Listening Room	350	Newly added in v3.2.0	5Hz-150Hz	20Hz-120Hz +/-1.4dB	ASH-Listening-Set	Subwoofer	Binaural
Low-frequency Response D	Studio	240	Newly added in v3.2.0	0Hz-150Hz	20Hz-120Hz +/-1.0dB	Derived from multiple RIR Datasets	Mixed	Binaural
Low-frequency Response E	Audio Lab	350	Newly added in v3.4.0	0Hz-150Hz	20Hz-120Hz +/-3.0dB	Derived from multiple RIR Datasets	Mixed	Binaural
Low-frequency Response F	Studio live room	350	Newly added in v3.4.0	0Hz-150Hz	20Hz-120Hz +/-2.0dB	BBC Maida Vale Impulse Response Dataset	Loudspeaker	Binaural
Low-frequency Response G	Listening Room	350	Newly added in v3.4.0	0Hz-150Hz	20Hz-120Hz +/-3.0dB	Derived from multiple RIR Datasets	Mixed	Binaural
Low-frequency Response H	Listening Room	600	Newly added in v3.4.0	0Hz-150Hz	20Hz-120Hz +/-4.0dB	The ISOBEL Sound Field Dataset	Subwoofer	Binaural
Low-frequency Response I	Recording Studio	700	Newly added in v3.4.0	0Hz-150Hz	20Hz-120Hz +/-2.0dB	RSoANU: RIR Dataset	Loudspeaker	Binaural
Low-frequency Response J	Listening Room	350	Newly added in v3.4.0	0Hz-150Hz	20Hz-120Hz +/-3.0dB	The ISOBEL Sound Field Dataset	Subwoofer	Binaural

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License

ASH-Toolset is distributed under the terms of the GNU Affero General Public License v3.0 (AGPL-3.0). A copy of this license is provided in the file LICENSE.

Contact

Shanon Pearce - srpearce55@gmail.com

Project Link: https://github.com/ShanonPearce/ASH-Toolset

Distribution: https://sourceforge.net/projects/ash-toolset/

Acknowledgments

Libraries

• DearPyGui
• DearPyGui Ext
• DearPyGui Extend
• numpy
• scipy

Datasets

This project makes use of various publicly available HRTF, RIR, and BRIR datasets. Refer to the sheets provided in the ASH-Toolset\docs folder for information on the raw datasets used in this project. Further information on the HRTF datasets can be found at the SOFA conventions repository.