VDK 6.0.0 - 3rd November 2025

Summary

We’re excited to announce the release of VDK 6.0.0, featuring a redesigned Android SDK, a streamlined interface, and powerful new capabilities such as Barge-In support. This update modernizes the Android development experience, improves integration, and transitions Studio to a fully online platform.

What's New in VDK 6.0.0?

Barge-In Support: VDK now supports Barge-In across all platforms, allowing users to interrupt ongoing speech output with new input — enabling more natural and responsive voice interactions.
Android SDK Redesign: The Android SDK has been redesigned for better usability and easier integration. Resource handling has been optimized, and the development workflow has been simplified.
ASR/TTS Engine Enhancements: Both vsdk-csdk-asr and vsdk-csdk-tts engines have been updated to support a 16k page size on Android, improving consistency and performance in speech processing tasks.

Learn More

Additional updates and refinements have been made across the VDK ecosystem to enhance developer experience and performance.
For developers upgrading from earlier versions, please refer to the Migration Guide for detailed instructions and compatibility notes.

We’re committed to improving usability, flexibility, and performance — and your feedback on VDK 6.0.0 is always welcome.

Versions

Samples (C++)

Component	Package name	Version	Technologies
Chained grammars	chained-grammars	6.2.0 UPDATED	VOICE RECOGNITION (GRAMMAR)
Dynamic grammar	dynamic-grammar	6.2.0 UPDATED	VOICE RECOGNITION (GRAMMAR)
Simple application	simple-application	6.2.0 UPDATED	VOICE RECOGNITION (GRAMMAR) VOICE SYNTHESIS
Tts	tts	6.2.0 UPDATED	VOICE SYNTHESIS
Voice biometrics	voice-biometrics	6.2.0 UPDATED	VOICE BIOMETRICS
Voice Commands Language Understanding	voice-commands-language-understanding	3.2.0 UPDATED	VOICE RECOGNITION (CONTINUOUS)
Speech Enhancement	speech-enhancement	2.2.0 UPDATED	VOICE RECOGNITION (GRAMMAR) SPEECH ENHANCEMENT

VSDK (C++)

Component	Version
Vsdk	10.3.1 UPDATED
Vsdk-csdk-asr	1.4.1 UPDATED
Vsdk-csdk-tts	1.4.1 UPDATED
Vsdk-idvoice	5.2.1 UPDATED
Vsdk-tssv	4.2.1 UPDATED
Vsdk-vnlu	3.2.2 UPDATED
Vsdk-s2c	2.2.3 UPDATED
Vsdk-audio-portaudio	4.3.1 UPDATED

Samples (JAVA)

Component	Package name	Version	Technologies
Chained grammars	chained-grammars	7.0.0 UPDATED	VOICE RECOGNITION (GRAMMAR)
Dynamic grammar	dynamic-grammar	6.0.0 UPDATED	VOICE RECOGNITION (GRAMMAR)
Free speech	free-speech	4.0.0	VOICE RECOGNITION (CONTINUOUS)
Simple application	simple-application	6.0.0 UPDATED	VOICE RECOGNITION (GRAMMAR) VOICE SYNTHESIS
Tts	tts	7.0.0 UPDATED	VOICE SYNTHESIS
Voice biometrics	voice-biometrics	4.0.0 UPDATED	VOICE BIOMETRICS
Voice Commands Language Understanding	voice-commands-language-understanding	1.0.1	VOICE RECOGNITION (CONTINUOUS)
Vdk service	vdk-android-sample-service	1.0.0

VSDK (JAVA)

Component	Version
Vsdk	7.1.2 UPDATED
Vsdk-csdk-asr	3.1.1 UPDATED
Vsdk-csdk-tts	3.1.1 UPDATED
Vsdk-idvoice	4.1.1 UPDATED
Vsdk-tssv	4.1.1 UPDATED
Vsdk-vnlu	2.3.0 UPDATED
Vsdk-s2c	3.1.1 UPDATED

Details

Studio

VDK Web Studio

Features:

Now online: The new VDK Web Studio replaces the desktop version, providing an accessible, browser-based development environment.
AI Grammar Generator: Automatically generate grammars using AI-powered suggestions.
Grammar Unit Tests: Introduced built-in grammar testing tools to validate ASR and NLU configurations.
Migration Guide: A dedicated documentation page is available to help users transition from the desktop Studio to the new Web Studio.

VSDK (C++)

Vsdk

Features:

Barge-in support: The vsdk-s2c supports barge-in so you can synthesis text while using the voice recognition.
Minimum GCC Version: The vsdk-csdk-asr and vsdk-csdk-tts now require GCC 12 minimum. Other components remain compatible with GCC 9.

Deprecation: ARMv7 is no longer supported.

VSDK (Android)

Vsdk

Features:

Updated Toolchain:
- NDK Version: r28b
- Minimum Android API Level: 24 (Android 7.0 Nougat)
- Java Version: 17
Deprecation: ARMv7 is no longer supported on Android.
Performance: Updated ASR/TTS engines for Android with 16k page size support.
SDK Redesign: Simplified resource management and development workflow.
Resource Release Procedure: Streamlined and consistent across all technologies, ensuring proper cleanup of recognizers, models, channels, engines… before reinitialization.
Barge-In Support: Barge-In is enabled by default, automatically removing any device audio playback from the microphone input during recording.

Assets: existing data remains fully compatible with this version.