Frequently Asked Questions

IndexTTS2 automatically generates natural-paced speech. The model intelligently adjusts timing based on the text content to produce natural-sounding audio. Advanced duration controls and phoneme-level precision are available for Pro users.

Yes! IndexTTS2 decouples emotion from voice timbre by design. Pro users can control emotions in three ways: using the voice reference's natural emotion, uploading emotion reference audio (2-30 seconds), or using 8-dimensional emotion vectors (happy, angry, sad, afraid, disgusted, melancholic, surprised, calm).

Yes, this feature is available on the Pro plan. You can upload an audio file (WAV, MP3, M4A) or record directly using your microphone. Each reference must be between 2-30 seconds and requires explicit consent from the voice owner. You can create up to 20 custom voices on Pro (3 on Free).

Free plan users can generate up to 120 characters per request and 20,000 characters per month. Pro plan users can generate up to 1,000 characters per request and 1,000,000 characters per month with priority processing.

IndexTTS2 currently supports English and Chinese. We're working on adding more languages in the future. Stay tuned for updates!

You can generate audio in MP3 or WAV format. MP3 is recommended for smaller file sizes, while WAV provides uncompressed audio quality.

Generation time varies based on text length and server load. Pro users receive priority processing and typically experience faster generation times. Free users may need to wait in a queue during peak times.

Yes, Pro plan users have full commercial rights to use generated audio in their projects, including commercial videos, games, podcasts, and other media. Free plan users are limited to personal, non-commercial use only.

Always obtain explicit consent before cloning someone's voice. Disclose synthetic media where required by law or platform policies. Do not use voice cloning for fraudulent, harmful, or illegal purposes. Comply with all local laws and regulations regarding synthetic media.

Click the 'Upgrade to Pro' button on the pricing page or dashboard. You'll be redirected to a secure Stripe checkout page. After payment, your account will be upgraded immediately with access to all Pro features.

Yes, you can cancel your Pro subscription at any time from your dashboard. Your Pro access will continue until the end of your current billing period. After cancellation, you'll revert to the Free plan.

If you experience any website malfunctions, technical issues, or problems with payment/upgrading to Pro, please contact our support team at indextts2@toolrain.com. We'll respond as soon as possible to help resolve your issue.