AWT2 overview

Audio Watermarking Tools 2 (AWT2) is a flagship solution in the AWT products family. AWT2 is a set of software utilities for embedding (and retrieving) digital watermarks carrying arbitrary digital data within (from) audio files and streams. AWT2 uses proprietary patented* technology to imperceptibly embed watermarks directly into the audio content so that they cannot be removed without damaging the original audio quality. The tools are distributed as a package of console utilities running on Microsoft Windows, Apple Mac OS , Linux/*nix Intel and ARM systems. AWT2 SDK is available for all major desktop and mobile platforms, including iOS and Android.

AWT2 implements so called "blind watermarking" approach in the sense that the watermark can be extracted directly from the watermarked audio recording (so that the source audio is not needed).

AWT2 highlights:

- free evaluation package (no risk, no obligations)
- cross-platform software (PC Windows, Linux, Mac OS, ARM, iOS, Android, WebAssembly/WASM...)
- console tools for easy automation and quick deployment on servers
- real-time stream encoding and decoding in console/terminal
- detailed documentation with examples and tips
- flexibly configurable algorithm
- industrial grade watermarking performance providing:
    · truly robust watermarks
    · very high watermarking data rate
- unique, proprietary, patented technology
- dual-layer (dual-stage)  watermarking support
- SDK available
    · cross-platform
    · thread-safe
    · with true real-time audio stream encoding and decoding functionality

AWT2 performance highlights:

AWT2 watermarks are inaudible and highly robust, surviving multi-pass low bitrate transcoding with lossy coders, mixing, effect processing, acoustic coupling (transducing via air) and time stretching. AWT2 offers unprecedentedly high watermarking data rate up to 125 bps (i.e. more than 16 bytes in one second of audio); watermark payloads up to 120 bytes long are supported.

AWT2 evaluation package is available upon request.

AWT2 can optionally be supplied with an optional AWT2 Watermark Listener — an Android application that lets you use your portable Android device (phone, tablet) to detect digital watermarks in the audio content processed with AWT2 technology.

Check how AWT2 features and functionality compares to other products from the AWT family.

AWT2 applications

AWT2 is a universal, scalable and flexible data-hiding solution addressing different applications and use-cases from the following areas:

  • Digital licensing and digital delivery for audio & music distribution, selling audiobooks, music promo sharing, etc.
  • Audio authenticity and proof of authorship & ownership
  • Protection of sensitive audio recordings (phone calls, clinic visits, etc.)
  • Monitoring of airplay (e.g. commercials, music, etc.)
  • Live broadcast protection
  • Interactive and event-based experiences, signaling and second screen sync over the sound

How to evaluate

Evaluation (demo) version of AWT2 for all major desktop, server and mobile platforms is available upon request.

All packages contain command line (terminal) encoder, decoder, detailed technology manual and illustrative examples. If you wish to integrate AWT2 into your software, you can use AWT2 SDK available for all major desktop, server and mobile platforms upon request.

Licensing and information inquiries

Please send your inquiries to the following e-mail address:



Updated: September 10, 2023
latest AWT2 version: 0.14.07