DVS Audio Library (ap_ds) Quick Guide and FAQ

Version: 2.0
Updated: March 22, 2026
Project Homepage: https://www.dvsyun.top/ap_ds | https://apds.top

This document is a quick reference guide for the DVS Audio Library (ap_ds) Open Source License (Version 2.0). It is for informational purposes only and does not constitute legal advice. In the event of any conflict or ambiguity, the terms of the full license text shall prevail.

1. Official Brand Names

The official name of this project is ap_ds, and the following names are also granted as officially recognized brand identifiers (all are case-insensitive):
- AP_DS
- Audio Library By DVS
- DVS Audio Player

Modified Versions may not use any of the above names or their variants.

Example:
- ✅ Compliant modified version name: My Awesome Audio Engine (Based on ap_ds)
- ❌ Non-compliant name: AP_DS_Pro or DVS Enhanced Audio Library

2. Quick Usage Guide

✅ What You CAN Do

• Any Commercial Use: Integrate into commercial products, use in cloud services, internal corporate use—all completely free.
• Modify the Code: Make any modifications to suit your needs.
• Integrate into Closed-Source Projects: No requirement to open source your own code.
• Sell Products: Sell solutions or products that incorporate the Software.
• Education and Research: Use for teaching, research, course materials, and academic papers free of charge.
• Distribute Modified Versions: Must use an Independent Brand and comply with the Brand Protection clauses.

❌ What You CANNOT Do

• Misuse the Name: You must not name your Modified Version "ap_ds", "AP_DS", "Audio Library By DVS", "DVS Audio Player", or any related name.
• Misrepresent: You must not claim your Modified Version is official or endorsed.
• Remove Copyright Notices: You must not remove or hide the original copyright, patent, or trademark notices.
• Illegal Use: You must not use the Software for any illegal or malicious purpose.
• Sue the Author: You must not file a patent lawsuit against the Author.

👍 What You SHOULD Do

• Retain Copyright: Keep all original copyright notices intact in all copies.
• Provide Attribution: Clearly state the Software as the source in documentation or products, and include the project homepage.
• Report Security Issues: Notify the original author first when you discover a security vulnerability.
• Establish an Independent Brand: Modified Versions must create a new, non-confusing project brand.
• Clarify Responsibility: Provide clear technical support and a statement of responsibility for your Modified Version.
• Respect Contributions: Adhere to the spirit and ethics of open source.

3. Frequently Asked Questions (FAQ)

Q1: Can a company integrate ap_ds into a commercial product?
A: ✅ Yes, absolutely. No payment, reporting, or special authorization is required.

Q2: Can I modify ap_ds and publish my version?
A: ✅ Yes, but you must strictly adhere to the Brand Protection clause. Your project must use a completely independent name (cannot contain "ap_ds", "AP_DS", "Audio Library By DVS", or "DVS Audio Player"), and clearly state that it is based on ap_ds. You are also responsible for providing support for your own version.

Q3: Do I have to open source my code if I modify ap_ds?
A: ❌ No, you are not required to. You may distribute your Modified Version in binary or closed-source form.

Q4: If I provide a cloud service (SaaS), do I need to pay?
A: ❌ No, payment is not required. However, if you find the project helpful, we welcome technical contributions or community support.

Q5: What happens if I challenge the author's patents or file a lawsuit?
A: 📞 According to the Patent Defense Termination clause, if you or your affiliates initiate a patent infringement lawsuit against the Author, all your rights under this License (including use, distribution, etc.) will automatically and immediately terminate.

Q6: Why are the branding requirements for Modified Versions so strict?
A: This is to protect all users. It prevents confusion where users might download the wrong version or be unable to find the correct maintainer when they encounter issues. A clear separation of responsibilities is in the best interest of users and the project ecosystem. The officially recognized brand names include ap_ds, AP_DS, Audio Library By DVS, and DVS Audio Player—all of which are protected.

Q7: What if I accidentally violate a term of the license?
A: Immediately stop the violation and rectify it within 30 days. For example, if you used an incorrect project name, rename it. Your rights can then be automatically reinstated.

Q8: Who should I contact for special licensing requests or legal questions?
A: You can submit a detailed inquiry via GitHub Issues (preferred for technical and licensing questions), or send an email to me@dvsyun.top or dvs6666@163.com. The author will respond within 7 business days.

Q9: What are the project homepages?
A: The official project homepages are: https://www.dvsyun.top/ap_ds and https://apds.top. Both addresses are accessible.

Q10: I don't plan to modify the library. I just want to include the official version in my commercial software and sell it. Is that allowed?
A: ✅ Yes, this is fully permitted. You are free to use the official, unmodified version of ap_ds in any commercial product or service, under the terms of this license. You must still comply with the attribution requirements (e.g., retain copyright notices and provide source attribution in your documentation).