Q. What is the range supported for BlockID?

A. For audio objects with extended block id support, block id should be in the range – 33024 to 65280 in multiples of 256.

Q. Not able to load the audio library (VirtualAmp.dll or Toolbox dll)

A. If VirtualAmp.dll depends on another dll which is not part of GTT, GTT will fail to load the dll. In this case user needs to copy the dependent dlls to C:\Program Files\Harman\HarmanAudioworX\tools\GTT folder.

Q. GTT stops the audio from other application when launched?

A.  GTT doesn’t stops audio from other application, However If user face any such difficulty.

Change the properties of the sound settings in your laptop/ PC. Uncheck the check box which says, “Allow application to take exclusive control of device.”

Following sections contain in this topics.

• xAF Known Issues
• GTT Known Issues
• AudioworX RSDK Known Issues

The table below outlines the xAF know issues.

Issues/ Limitations	Description
VST only issues/Limitations	The input and output sample rates of the VST must always be 48000 Hz so any audio core with inputs/outputs connected to the device input/output should also be connected to core objects at 48000 Hz.
IVP	Using Block Length <1024 with MME driver in sound card settings will have dropouts. Use Asio or block length greater than or equal to 1024.

Known Issues with a workaround and will not be fixed

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Known Issues	Description
GTT Core Linking	AWXNG-5049: [SMART] Label names are lost when it’s associated AO (state variable) is removed from signal flow. The linking that is done before extract will not be available on CAO edit as we are using a dummy device/core hence the hiqnetaddress would differ. Workaround: Do the smart window mapping only on CAO edit.
GTT Signal Flow	Volvo project getting a compiler error “Block ID range error with SpeakerProtection AO” (Block id for SpeakerProtection AO need not be 16 bit and hence need to be corrected at project end)

 

Known Issues and will be fixed in next release

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Known Issues	Description
Checksum	In read cases checksums Match When tuning data set is very small.
Probe points	Distorted audio spectrum is generated when change the Probe Points during Probing. Probe Points / Streaming: Distorted spectrum for Probe Points in IVP is observed when probe point is initiated after the streaming is paused and played back.
UI/UX	Opens multiple windows during 1st time launch.
GTT MPC	Keeping the Map file open in Hex Editor Neo and try to export all from MPC (such that it tries to overwrite the map file which is open in Neo editor) results in GTT crashes.
GTT Core /SFD	Multi connection from one input group to multi-input core to be avoided. GTT Crashes While Opening Core Object Settings After Deleting Virtual Cores with Existing Core Object Settings by Keeping MPC window open (Workaround: CloseMPC before doing edit device).
GTT Native Panel	Legend View of Control Mixer Panel is not updated properly when we re-assign color and label. Workaround: Reopen the panel, all labels will be visible in the Legend View.
Panel Designer	Help links are mapped incorrectly in some Custom Panel Windows.
MIPS Window	MIPS window is limited to 255 audio objects per core.
RTA/IVP	RTA – Delay Mode do not show aligned values in Live ribbon bar vs Graph.

• Clearing Flash Files: GTT crashes when try to import another project and send signal without clearing the existing flash files.

Deleting the flash files manually is not required when moving from offline device to online device.

• Block ID range: The block ID of the AOs that support extended block IDs shall range from 33024 to 65280 in multiples of 256 and the GTT ensures the same with appropriate error messages if invalid.
  For all the other AOs that do not support extended block ID, the range needs to be restricted from 1 to 32767 only. But presently the GTT is not restricting in this range and allowing till 65535.
• Double-Clicking the gttd project just launches the GTT installer and closes immediately. Fails to open gttd project by double-clicking it.
• Mandatory “device.flash” file: IVP and VST3 might not work correctly and show number of inputs and outputs or might even crash if no “device.flash” file is present1
• Legacy device: The legacy device is not supported in this release because of Master Control related changes and dependencies. This will be addressed in y+1-release.

This release requires the following software to be installed for SW developers:

• Microsoft Visual Studio  2017 and 2022
  • For customers using VST3 : Microsoft Visual Studio 2017 or 2022
• CMake 3.24 and above
• Python 2.7

Release Details

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This release is part of an AudioworX package and is delivered as a Windows installer.

Release Type	Release Name	Release Version	Release Date
Major Release	Y	25.0.0.2528	11-July-2025

 

Components of the AudioworX Package

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This package contains the DSP framework (xAF), Audio Algorithm Toolbox (AAT), Global Tuning Tool suite (GTT) with embedded Signal Flow Designer (SFD), and AmpSrv2.

Components	Description
Extendable Audio Framework (xAF)	xAF is created to consolidate numerous existing frameworks within Harman into a single vision that provides a single workflow and structure for audio processing development and usage. It is also designed to provide a richer feature set required by internal and external stakeholders.
Global Tuning Tool (GTT)	GTT is a branch of the Audio Architect from Harman’s Professional Division. It focuses on integrating HALO sonic and Audio/Acoustics Measurement, Analysis, and Tuning GUIs into one consolidated and comprehensive tool to increase tuning efficiency, performance, and quality. It has common interface panels for systems, algorithm designers, and developers to ensure seamless and focused development of new algorithms right from the beginning.
Signal Flow Designer (SFD)	SFD is a software component of GTT to create signal flows based on the available audio objects of Harman’s audio algorithm toolbox.
Audio Algorithm Toolbox (AAT)	AAT is a collection of audio objects and audio features. The Audio Algorithm Toolbox includes algorithms and technologies for both Audio and HALOsonic.
AmpSrv2	This software connects the tuning tool to a physical target device or a virtual amplifier.

For assistance with AudioworX, please get in touch with our technical support team at AudioworXSupport@harman.com.