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About

Thanks for using Transpose!
Made with ❤ in The Netherlands. For musicians, by musicians.
If you like it please leave your message here.

Our Mission: Encouraging Music Making

We believe that making music is for everyone. That’s why the core of Transpose is a powerful, free tool for your daily practice sessions. It is our contribution to the music community, to help as many people as possible grow and enjoy playing.

Privacy Policy

Last updated: April 4, 2026

We respect your privacy

We don’t serve ads, sell your data, or do anything sneaky.
Most settings stay on your device. If you sign in for Pro features, we store the account and service data needed to provide those features in Firebase. If you request deletion, we will delete or anonymize personal data unless retention is required for legal, security, fraud-prevention, accounting, or backup purposes. Your email will never be sold or shared, and we’ll only send newsletters if you’ve given us permission.

Summary of our privacy commitments

We do not sell your personal data. We use personal data only as needed to provide the Service, process subscriptions, respond to support requests, maintain security, and improve the product as described in this Policy.

Data we collect

Classic version (no sign-in)

  • We do not intentionally collect directly identifying personal data for the free core functionality of the extension.
  • No browsing history, audio, or video is recorded or stored.
  • Settings and history are stored locally or in your personal synced browser settings using Chrome’s storage API.
  • Limited usage analytics may be collected via Google Analytics with IP anonymization to understand general feature usage and performance. We do not send browsing history, audio, video, or full page URLs.

Support-related information is collected only if you contact us, and payment-related information is processed only if you purchase or subscribe to Pro.

Pro version (Google sign-in required)

  • Account information - Google account identifier, display name, and email address (via Firebase Authentication). Stored in Firebase for as long as needed to provide the Service, unless deletion, anonymization, or retention is required for legal, security, fraud-prevention, accounting, or backup purposes.
  • Extension settings and history - stored locally or in your account for sync across devices.
  • Website and extension coordination - For signed-in Pro flows, including support, trial, upgrade, and account pages, pages on transpose.video may communicate with the installed extension to coordinate those flows and troubleshoot account, subscription, or settings issues. This may include limited account and extension state such as extension version, signed-in status, subscription or trial status, and your email address. We do not sell this information or use it for advertising.
  • Marketing consent - if you opt in, your email address is used for newsletters only. You can unsubscribe at any time.

When you contact us for support

  • When you submit a support request via our contact form or by email, we collect your name, email address, and the information you provide to us. This may include technical details such as your operating system, browser version, extension version, and the specific issue you are facing.
  • If you are signed in, we may also use your email address, account status, subscription or trial status, and relevant extension state to identify your account and troubleshoot the issue you contacted us about.
  • This information is used to provide support, troubleshoot account or settings issues, and improve our service.
  • Support correspondence may be retained for as long as reasonably necessary to handle your request, maintain support history, prevent abuse, and improve the Service. You can request deletion of your support data by contacting us at privacy@transpose.video, subject to any legal or legitimate retention obligations.

Data Processing and Compliance

Transpose (operated by Tune73 B.V.) is an independent data controller under GDPR.

For Pro accounts, limited personal data (like email and subscription info) is processed for login and payment. This happens under GDPR-compliant agreements with our subprocessors, such as Firebase (Google) and Paddle.

Third-party processors and service providers

We use third-party providers where needed to operate the Service. Depending on your use of the Service, these may process limited personal data on our behalf or under their own role as independent provider:

  • Analytics - Google Analytics, for aggregated usage statistics with IP anonymization.
  • Authentication and hosting - Google Firebase, for authentication, account-related storage, and supporting infrastructure.
  • Payments - Paddle.com, as Merchant of Record for subscriptions, invoicing, taxes, and payment processing.
  • Support and communications - email and support tooling used to receive, manage, and respond to support requests and service-related communications.

We select providers that are appropriate for the service they perform and rely on contractual, technical, and organizational safeguards where applicable.

Payments & communications

Pro subscriptions are processed by Paddle.com as Merchant of Record. Paddle handles VAT, invoicing, and payment security under their own Privacy Policy.
Paddle may send you subscription-related emails such as receipts, renewal reminders, failed payment notices, and recovery prompts, as part of their Retain functionality. These communications are transactional, not marketing.

Permissions we request

The extension installs with limited browser permissions needed for its core interface and active-tab controls. Additional site access is requested only when needed for a specific site or feature.

Permissions are requested only when required for functionality:

  • ActiveTab – connect to and control media playback on the active tab.
  • Scripting – inject the extension logic needed to connect to supported media players on pages you choose to use with Transpose.
  • Storage – save settings and history locally or in your account.
  • Sidepanel – open the Transpose Pro interface next to the site content.
  • Host permissions (optional) – requested only for sites you choose to use with Transpose, including supported dynamic media sites and embedded players.
  • TabCapture (optional) – capture audio for pitch-shifting when no controllable media element is found. In some cases, Chrome may reload or reopen the current tab once so Tab Capture can start correctly.

Cookies

  • Extension: Does not set or use cookies.
  • Website (transpose.video): Uses cookies only for Google Analytics with IP anonymization, for aggregated usage statistics.

Third-party services

We are not affiliated with or endorsed by Google, YouTube, Spotify, Deezer, or any other third party whose services may be accessed through the extension.

Your rights (GDPR)

If you are in the EU/EEA, you have the right to:

  • Access, correct, or delete your personal data.
  • Restrict or object to its processing.
  • Request data portability.
  • File a complaint with your Data Protection Authority.

To request data deletion or changes, email privacy@transpose.video.

Terms of Service

Last updated: April 4, 2026

These Terms of Service (“Terms”) govern your use of the Transpose Video browser extension and the website transpose.video (together the “Service”), provided by Tune73 B.V., trading as Transpose Video (“we”, “us”, “our”).

By installing or using the Service, you agree to these Terms. If you do not agree, do not use the Service.

1. Service Description

Transpose Video lets you adjust pitch, playback speed, and loop sections of online videos and audio in real time.
The free version works out of the box for YouTube. Certain websites, including embedded YouTube videos, Spotify, Deezer, and other dynamic media platforms, require optional host permissions to connect to the HTML media element. If no media element can be found, TabCapture (audio only) may be used as a fallback for pitch shifting.
Pro features require sign-in with Google via Firebase Authentication and may require an active subscription.

1.1 Platform availability and compatibility.

The Service relies on third-party sites and players that may change their code, policies, or access rules at any time. Compatibility with third-party platforms such as YouTube, Spotify, and other services may change or break over time due to technical, legal, policy, browser, or platform changes outside our control. We do not guarantee continued support for any specific third-party service. If a platform opts out, blocks integrations, changes its technical setup, or it becomes otherwise impossible to connect, some or all features may stop working or may need to be changed, suspended, or removed. Device, browser, or OS limitations may also prevent the Service from functioning on certain setups.

1.2 Service availability

We do not guarantee that the Service will be uninterrupted, error-free, or available at all times. Temporary outages, bugs, performance issues, or feature failures may occur.

1.3 Service changes

We may modify, suspend, replace, or discontinue parts of the Service at any time, including to fix bugs, improve security, comply with legal requirements, or respond to third-party platform changes.

2. Eligibility

You must be at least 16 years old or have parental consent to use the Service.

3. Accounts & Authentication

Free features do not require sign-in.
Pro features require login with Google. We store the account and service data needed to provide those features in Firebase for as long as needed to operate the Service, unless deletion, anonymization, or retention is required for legal, security, fraud-prevention, accounting, or backup purposes.
Your Google account information is processed according to Google’s Privacy Policy.

Pages on transpose.video may detect whether the extension is installed. For signed-in Pro flows, including sign-in, trial, upgrade, support, and account pages, our site may also communicate with the extension to coordinate those flows.

4. Payments & Subscriptions

Payments for Pro subscriptions are processed by Paddle.com as Merchant of Record (handles VAT, invoicing, and payment security).
Subscriptions auto-renew unless cancelled.

Displayed prices may vary by country, currency, tax treatment, and promotional eligibility. The final price is shown at checkout.

We may change prices from time to time. Any price change applies immediately to new purchases and only from a future renewal date for existing subscriptions, after prior notice.

Refund Policy: Except where required by applicable law, purchases are non-refundable. Refunds are not provided solely because a third-party platform restricts, blocks, or changes the technical capability required for specific features, or because the Service is incompatible with a particular device, browser, or operating system, except where required by applicable law.

For consumers in the EU/EEA, mandatory statutory rights remain unaffected. Where digital services are supplied immediately at your request, your statutory right of withdrawal may be lost to the extent permitted by applicable law.

Lifetime access means access for the lifetime of the product/service, not a guarantee of perpetual availability of any specific feature, integration, website, or third-party platform.

5. Browser Permissions

The Extension may request:

  • ActiveTab – Control media playback on the current tab.
  • Scripting – Inject the extension logic needed to connect to supported media players on pages you choose to use with the Service.
  • Storage – Store settings and history locally or in your account.
  • Sidepanel – Open the Transpose Pro interface next to the site content.
  • Host permissions (optional) – For sites you choose to use with the Service, including supported dynamic media sites and embedded players.
  • TabCapture (optional) – Capture and process audio when no media element is detected. In some cases, Chrome may reload or reopen the current tab once so Tab Capture can start correctly.

Permissions are requested only when required for functionality.

6. Data Usage & Analytics

We may use Google Analytics to collect limited usage analytics for performance monitoring and feature improvement. We do not send browsing history, audio, video, or full page URLs. IP anonymization is enabled.

7. License

A Pro subscription grants you a limited, non-exclusive, non-transferable, and revocable license for personal use by a single individual. You agree not to share your account or subscription with others.

8. Acceptable Use

You may not:

  • Use the Service to infringe copyrights or violate laws.
  • Reverse-engineer or interfere with the Service.

9. Disclaimer of Warranties

The Service is provided “as is” and “as available” without warranties of any kind.

10. Limitation of Liability

To the maximum extent permitted by law, we are not liable for indirect, incidental, or consequential damages, or for temporary unavailability, bugs, third-party failures, or loss of data. Nothing in these Terms excludes or limits liability where such exclusion or limitation is not permitted by applicable law.

11. Changes to These Terms and Policies

We may update these Terms and Policies from time to time. If we make material changes, we will publish the updated version on this page and may provide additional notice where appropriate. Changes apply from the stated effective date and do not apply retroactively unless required by law.

12. Governing Law

These Terms are governed by Dutch law, without prejudice to any mandatory consumer rights that apply in your country of residence.

13. Contact

Email: info@transpose.video

Licenses

Summary of 3rd party software used in this application:

Bootstrap v4.1.3 (http://getbootstrap.com/)
Copyright Twitter, Inc.
Licensed under the MIT license
Angular
Copyright (c) Google LLC.
Licensed under the MIT License.
lodash
Copyright JS Foundation and other contributors
Licensed under the MIT license
RxJS
Copyright (c) 2015-2020 Google, Inc., Netflix, Inc., Microsoft Corp. 
and contributors
Licensed under the Apache License 2.0
tslib
Copyright (c) Microsoft Corporation.
Licensed under the 0BSD license
Jungle
Copyright 2012, Google Inc.
Licensed under the BSD 3-Clause license
SoundTouch JS audio processing library
Copyright (c) Olli Parviainen, Ryan Berdeen
Licensed under the GNU LGPL v2.1
Rubber Band Library
Copyright (c) 2007-2020 Chris Cannam and Breakfast Quay
Licensed under the GNU GPL v2 or later