Transfer Function
Magnitude, Phase, Coherence
$49.99
5.2for iPhone, iPad and more
Age Rating
Transfer Function Screenshots
About Transfer Function
Transfer Function is a dual-FFT acoustic analysis app that is used for sound system audio analysis. Since it can operate with music as the signal source, it can be used during a musical performance to monitor and turn the system equalization during the show.
Transfer function includes:
-- Magnitude Graph
-- Phase Graph
-- Coherence Plot
-- Delay Finder
-- Signal Generator
Normally a transfer function requires a two-channel interface, and that is true with this one, also, if you want to use it with program material (music).
However, you can use our Transfer Funciton with the internal iOS microphone, if you can send the pink noise generator output to the sound system input. In this configuration, the internal generator is routed back to the input as the reference channel. You can measure delay, magnitude, and phase using this setup.
When you use Transfer Function with a two-channel audio interface to run, such as the Studio Six Digital iAudioInterface2, then you can also use any audio source as the test signal, including music.
See our website for more information.
Transfer function includes:
-- Magnitude Graph
-- Phase Graph
-- Coherence Plot
-- Delay Finder
-- Signal Generator
Normally a transfer function requires a two-channel interface, and that is true with this one, also, if you want to use it with program material (music).
However, you can use our Transfer Funciton with the internal iOS microphone, if you can send the pink noise generator output to the sound system input. In this configuration, the internal generator is routed back to the input as the reference channel. You can measure delay, magnitude, and phase using this setup.
When you use Transfer Function with a two-channel audio interface to run, such as the Studio Six Digital iAudioInterface2, then you can also use any audio source as the test signal, including music.
See our website for more information.
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What's New in the Latest Version 5.2
Last updated on Oct 19, 2023
Old Versions
-Updated for latest iOS devices and new iOS versions
-Bug fixes and stability improvements
-Bug fixes and stability improvements
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Version History
5.2
Oct 19, 2023
-Updated for latest iOS devices and new iOS versions
-Bug fixes and stability improvements
-Bug fixes and stability improvements
5.1
Jul 13, 2022
-Bug fixes and improvements
-Support for more iOS devices and iOS versions
-Support for more iOS devices and iOS versions
5.0
Sep 24, 2021
-Bug fixes and stability improvements
-Updated for latest iOS and devices
-Updated for latest iOS and devices
4.2
Apr 2, 2021
-Bug fixes and stability improvements
-Added user registration feature
-Added user registration feature
4.1
Feb 4, 2021
-Bug fixes and stability improvements
4.0
Aug 20, 2020
-Bug fixes and stability improvements
-Support for direct data file access in Files app
-Support for latest devices and iOS versions
-Support for direct data file access in Files app
-Support for latest devices and iOS versions
3.2
Oct 9, 2019
-Updated Transfer Function for iOS 13 compatibility
3.1
Aug 12, 2019
-Updated for iOS 13
-Fixed issue with setup menu
-Bug fixes and stability improvements
-Fixed issue with setup menu
-Bug fixes and stability improvements
3.0
Apr 9, 2019
-Updated for latest iOS devices
-Bug fixes and stability improvements
-Bug fixes and stability improvements
2.9
Sep 14, 2018
-Updated for latest iOS and devices.
-Bug fixes and stability improvements.
-Bug fixes and stability improvements.
2.8
Sep 27, 2017
General
- Added Calibration Error Report link to support page
- Fixed crash on iOS 11 when saving screenshots
- Fixed crashes on iOS 8 and iOS 9
- Fixed issue with multiple Studio Six Digital apps trying to access our accessories
- Updated App Store in-app purchase accessing and authorization for iOS 11
Live Calibration Updates
- Added cloud-based database for all iOS devices that can be updated in real time
- All devices included
- Includes local default files, in case a device has no internet connectivity
- Different databases for each major iOS version, starting with iOS 10
- New iPhones added to live calibration database
- Added Calibration Error Report link to support page
- Fixed crash on iOS 11 when saving screenshots
- Fixed crashes on iOS 8 and iOS 9
- Fixed issue with multiple Studio Six Digital apps trying to access our accessories
- Updated App Store in-app purchase accessing and authorization for iOS 11
Live Calibration Updates
- Added cloud-based database for all iOS devices that can be updated in real time
- All devices included
- Includes local default files, in case a device has no internet connectivity
- Different databases for each major iOS version, starting with iOS 10
- New iPhones added to live calibration database
2.7
Aug 28, 2017
-Bug fixes and stability improvements
-Support for newer iOS devices
-Fixed crash on iOS 11 beta
-Support for newer iOS devices
-Fixed crash on iOS 11 beta
2.6
Mar 18, 2017
* Updated for latest iOS devices.
* Removed support for older iOS versions, now requires iOS 8 minimum.
* Added simultaneous background launch protection to prevent problems in iOS 10 when plugging in iTestMic or iPrecisionMic when more than one Studio Six Digital app is installed.
* Removed support for older iOS versions, now requires iOS 8 minimum.
* Added simultaneous background launch protection to prevent problems in iOS 10 when plugging in iTestMic or iPrecisionMic when more than one Studio Six Digital app is installed.
2.5
Nov 21, 2016
- Updated for iOS 10 and new devices
2.4
Sep 26, 2016
- Updated to support iPhone 7 and iPhone 7 Plus.
2.3
May 7, 2016
Transfer Function, dual-channel FFT for iOS
** Bug fixes and calibration improvements
** Bug fixes and calibration improvements
2.2
Apr 29, 2016
Transfer Function -- Professional dual-FFTaudio system analyzer. Class One calculations meet all ANSI and ISO standards for Type 1 Sound Level Meters.
Now supports multi-tasking Slide Over and Split Screen on newer iPads that support this feature.
Calibrations adjusted for all iOS devices.
Now supports multi-tasking Slide Over and Split Screen on newer iPads that support this feature.
Calibrations adjusted for all iOS devices.
2.1
Apr 12, 2016
Measure loudspeaker system performance using the internal generator and mic, or an external source with a 2-channel interface.
** Updated for iOS 9.3. New calibrations loaded for all iPads.
** Save/Recall Updates
* New! Auto-save file name options are now available from the Save/Recall screen mini-menu. Tap the icon with 3 lines.
* New! Added auto-save Name List to store frequently-used file names.
* Fixed auto-save sequence numbers resetting after app relaunches.
* Fixed case where files may not be saved when using auto-save immediately after Delete All Files.
* Fixed possible crash if action buttons were tapped with no file name selected.
* Improved auto-save naming.
**Improved referral screen layout.
**Now always uses 24-bit audio mode if iPrecisionMic is present.
**Fixed an issue where internal mic gain could change coming out of the background
** Support Menu
* Fixed Forum page access.
* Fixed "Rate This App" access.
* Fixed access to other Studio Six Digital webpages
** Updated for iOS 9.3. New calibrations loaded for all iPads.
** Save/Recall Updates
* New! Auto-save file name options are now available from the Save/Recall screen mini-menu. Tap the icon with 3 lines.
* New! Added auto-save Name List to store frequently-used file names.
* Fixed auto-save sequence numbers resetting after app relaunches.
* Fixed case where files may not be saved when using auto-save immediately after Delete All Files.
* Fixed possible crash if action buttons were tapped with no file name selected.
* Improved auto-save naming.
**Improved referral screen layout.
**Now always uses 24-bit audio mode if iPrecisionMic is present.
**Fixed an issue where internal mic gain could change coming out of the background
** Support Menu
* Fixed Forum page access.
* Fixed "Rate This App" access.
* Fixed access to other Studio Six Digital webpages
2.0
Feb 15, 2016
* Bug fixes and stability improvements
* Added Projects feature to Settings menu, project data can be saved in data files
* Added Projects feature to Settings menu, project data can be saved in data files
1.9
Dec 3, 2015
** Updated all calibrations for iOS 9.1
** Added support for iPad Pro
** Fixed crash on launch on iOS 7
** Added support for iPad Pro
** Fixed crash on launch on iOS 7
1.8
Nov 23, 2015
** Updated for iOS 9.1 **
** Added support for iPhone 6S and 6S Plus
** Added iCloud file support
** Added support for iPhone 6S and 6S Plus
** Added iCloud file support
1.7
May 5, 2015
** Bug fixes and stability improvements
1.6
Jan 26, 2015
Bug fixes and stability improvements.
Now supports 64-bit operation.
Now supports 64-bit operation.
1.5
Oct 1, 2014
— Now supports iOS 8. Fixes audio issues on iPad 2, iPad 3, iPad 4, and iPad mini.
— Now supports iPhone 6 and iPhone 6 Plus displays.
— Bug fixes and stability improvements.
— Now supports iPhone 6 and iPhone 6 Plus displays.
— Bug fixes and stability improvements.
1.4
Jun 13, 2014
** Bug fixes and stability improvements.
** Improved calibration system to handle multiple headset, USB audio, and iAudioInterface2 microphones.
** Improved calibration system to handle multiple headset, USB audio, and iAudioInterface2 microphones.
Transfer Function FAQ
Click here to learn how to download Transfer Function in restricted country or region.
Check the following list to see the minimum requirements of Transfer Function.
iPhone
Requires iOS 12.1 or later.
iPad
Requires iPadOS 12.1 or later.
iPod touch
Requires iOS 12.1 or later.
Transfer Function supports English, French, German, Japanese, Polish, Simplified Chinese, Swedish
Transfer Function contains in-app purchases. Please check the pricing plan as below:
Reference Curves Option
$14.99
