LARSA Analyzer3.10 - App Store

LARSA, or Loudspeaker And Room System Analyzer, is a powerful impulse response measurement and analysis tool. It is ideally suited for measuring loudspeakers in rooms, multi-speaker setups, car audio systems, home theater systems or larger, installed loudspeaker systems.

It is an easy way to profile a system and give you the information you need to equalize or tune your loudspeakers for the best possible performance in your listening space. LARSA brings measurement power and convenience previously available only on desktop computers.

Key Features of LARSA include:
* Easy-to-learn single-tap recording of an impulse response.
* IR averaging features. Perform test/re-test analyses of measurements or a make a spatial average.
* IR windowing features.
* Energy Time Curves.
* Delay time calculation for time-alignment in bi- and tri-amp applications.
* Save and recall functionality.
* Full iCloud support for easy access to your measurements on your desktop or laptop.

Version History -Bug fixes and stability improvements
-Support for latest iOS versions 3.10 Sep 11 -Bug fixes and stability improvements 3.9 12/22/2025 -Fixed possible crash when running in delay mode without a delay signal 3.8 12/01/2025 -Updated for new iOS devices
-Bug fixes and stability improvements 3.7 11/24/2025 -Updated for latest iOS devices and calibrations
-Bug fixes and operational improvements 3.6 11/20/2024 -Updated for latest iOS devices and calibrations
-Bug fixes and operational improvements 3.5 07/10/2024 -Updated for latest iOS devices and new iOS versions
-Bug fixes and stability improvements 3.4 10/19/2023 -Bug fixes and improvements
-Support for more iOS devices and iOS versions 3.3 07/13/2022 -Bug fixes and stability improvements
-Updated for latest iOS and devices 3.2 09/24/2021 -Bug fixes and improvements
-Now supports external test signals
-Can be used with our Apple TV 4K Surround Sound Generator 3.1 02/04/2021 -New! Added External Trigger mode, now works with signals generated from other sources
-External chirp mode works with Apple TV 4k Surround Generator with Atmos support
-Bug fixes and stability improvements
-Support for direct data file access in Files app
-Support for latest devices and iOS versions 3.0 08/26/2020 -Updated for iOS 13 compatibility 2.7 10/14/2019 -Updated for any iOS 9 or later
-Fixed issue with setup menu
-Bug fixes and stability improvements 2.6 08/13/2019 -Updated for latest iOS devices
-Bug fixes and stability improvements
-Temporarily removed 3D plots while we upgrade them 2.5 04/09/2019 -Updated for latest iOS and devices
-Bug fixes and stability improvements 2.4 09/07/2018 -Now supports iPhone X and other new iOS devices
-Support for latest iOS updates added
-Improvements to UI and operations
-Bug fixes and stability improvements 2.3 03/15/2018 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 2.2 09/28/2017 -Bug fixes and stability improvements 2.1 08/28/2017 * 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. 2.0 03/17/2017 - Updated for iOS 10 and new devices 1.9 11/21/2016 - Updated to support iPhone 7 and iPhone 7 Plus. 1.8 09/24/2016 ** LARSA, Loudspeaker And Room System Analyzer

** Bug fixes and calibration updates 1.7 05/10/2016 -- 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.
** Fixed filter design in-app purchase option 1.6 04/27/2016 Best room audio and speaker performance analyzer for iOS.

** 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 1.5 04/12/2016 * Bug fixes and stability improvements
* Added Projects feature to Settings menu, project data can be saved in data files 1.4 02/15/2016