SDK for audio watermarking

Mark your audio to indicate its origine and whether it is AI generated (EU regulation).

Technicalities

Audio features

  • Can process any audio signals/recordings (speech, music, etc.)
  • Imperceptible distortions

Technical features

  • Marking, on your hardware
    • Very low memory usage
    • No dynamic memory allocation
    • No GPU needed
    • On average 2000x faster than real-time on consumer hardware
    • Known and constant latency before processing. Within 30-60ms (compensated for when using file-based processing)
  • Detection, on our servers
    • Fast response time
    • API
    • Free

Supported languages

PythonC/C++
OS
LinuxLinux
WindowsWindows
macOSmacOS
Processing modes
File-based
Streaming—
Real-time—

Contact us to request wrappers for other languages!

Quick setup

Follow these steps to register and run a quick example.

1

Install the Python package

$pip install cobalstamp
2

Create an account

Sign up here.

3

Create an API key

Generate an API key in your dashboard here.

4

Set the API key in your environment

$export COBALSTAMP_KEY=your_api_key_here
5

Start using the Python package

$python3 -c "import cobalstamp; print(cobalstamp.__version__)"

You're all set!

Run a quick example

Load audio, add a Cobalstamp watermark, and check the watermark back with a detection call. Save the following in a .py file and run it with python:

1import soundfile as sf
2import cobalstamp
3
4wav, fs = sf.read("input.wav", dtype="float32")
5
6# Add the watermark (isai=True: the audio is AI-generated)
7marked = cobalstamp.mark(wav, fs, isai=True)
8
9# Detect the watermark
10result = cobalstamp.detect(marked, fs)
11print(result)
12# {'marked': True, 'ppid': 'XXXX-XXXX-XXXX', 'isai': True, ...}

Pricing

License model: You pay to access the techno, you mark as much you want on your side. We handle the detection requests on our side.

Testing Marker

  • Python SDK
  • File-based marking and detection
  • Limited to 30min marking
€0.00 / month

Marker

  • Python SDK
  • File-based marking and detection
  • Unlimited marking and detection
Launch price
€200.00 / month

Custom

  • Python SDK
  • File-based marking and detection
  • Unlimited marking and detection
  • Real-time and streaming marking
  • C SDK
  • Custom data associated to the mark
  • Integration services
  • Custom support

Detector

  • Python SDK
  • File-based detection
  • Unlimited detection
  • No marking
€0.00 / month