Langlang Dubbing

What is Langlang dubbing?

Langlang Dubbing is an AI text-to-speech platform designed for short videos, audiobooks, novel tweets, advertisements, and informational content; its main function is to convert text into downloadable audio recordings.

The platform currently features over 1,100 AI hosts, more than 80 languages and over a dozen emotional styles. It also offers a voice-over editor, efficiency tools, voice cloning, a music library, mobile applications, and an open API.

Main functions

Intelligent voice-over editor

Host and language selection

• Users can select AI hosts based on language, gender, style, or scenario, and preview the quality of the audio first.
• The current public page lists over 80 languages, including Chinese, English, German, French, and others; the specific voice tones and language combinations are determined by the broadcaster pool.
• Some streamers are ordinary streamers, while those who are gold or super streamers require corresponding privileges.

Emotions and fine control

• Some streamers can convey emotions such as happiness, sadness, and excitement; it cannot be assumed that every streamer is capable of expressing all emotions.
• The editor supports nearly twenty different adjustment effects, including linked pronunciation, pauses, multi-tone characters, local acceleration, and reading with aliases.
• Users can adjust the wording of sentences or specific portions of text, so that names, numbers, abbreviations, and specialized terms appear more as intended.

Multiple voiceovers

• Multiple voiceovers allow different speakers to be assigned to various paragraphs or characters within the same editor; the process is similar to editing a document.
• It is suitable for novel dialogues, short plays, interviews, and question-and-answer sessions in courses, and it helps to reduce the need to export content in separate sections before reassembling them.
• The volume, speaking speed, and pauses of different streamers need to be adjusted uniformly for testing; otherwise, the switch between characters may appear abrupt.

Standard dubbing workflow

1. Register or log in to your account; new users should first check the available characters and the benefits offered to streamers.
2. Paste the text and divide it into sections based on characters, paragraphs, and the rhythm of the visuals.
3. Select the language, broadcaster, and mood, then listen to a short sample to confirm the style.
4. Set multiple pronunciations, aliases, pauses, liaison, speech rate, and local effects.
5. Submit the synthesis task and wait for it to be queued and processed.
6. Listen to the full version to check for mispronunciations, errors in pronunciation, volume levels, role transitions, and subtitle timing.
7. After modifying the problematic segment, re-compose it and download the audio for editing.

Long texts, subtitles, and batch synthesis

Long text synthesis

• A single page with long text can hold up to 50,000 characters, making it suitable for novels, audiobooks, and long-duration courses.
• The page offers MP3 and WAV outputs; MP3 is more widely used, while WAV is better suited for further editing and for preserving high audio quality.
• For long tasks, it is advisable to first listen to short paragraphs in order to avoid discovering issues with pronunciation or rhythm only after the entire text has been generated.

Subtitle synthesis

• Subtitle synthesis: It receives SRT files and generates audio from subtitle segments, suitable for videos that already have a timeline.
• Before importing, check the encoding, timecode, segment overlap, and length of individual sentences; split overly long subtitles if necessary.
• The length of the synthesized speech may not exactly match the duration of the subtitle intervals; therefore, it is still necessary to check the synchronization in the editing software.

Batch synthesis

• Batch synthesis allows multiple TXT files to be uploaded at once, reducing the need to create individual tasks for each piece of content.
• Batch tasks are affected by character limits, queues, the availability of streamers, and file format.
• It is recommended to use a consistent naming convention and retain the document version, so as to enable the corresponding relationship between the generated audio and the original file.

Text extraction and automatic axis setting

• The script extraction feature converts audio or video into text and can also generate subtitles at the same time.
• It automatically processes audio and video along with the corresponding text, and generates timeline subtitles for existing scripts.
• The accuracy of recognition is affected by accent, background music, multiple voices speaking at the same time, recording quality, and technical terminology.
• When making an official release, it is necessary to check each sentence for names, numbers, brands, terms, and time codes.

Other efficiency tools

Remove watermarks with one click

• The platform can decode the watermarks included in popular short-video platforms; members can use it on the web, while non-members need to use it through a designated mini-program.
• It can only handle watermarks added by the platform; it cannot remove the watermarks that are part of the video content itself.
• Before downloading and using someone else’s videos, it is necessary to check the copyright, portrait rights, music rights, and the platform’s rules; such actions should not be used to circumvent existing restrictions.

Audio Toolkit

• The audio toolkit is used to address common audio issues; the specific tools, as well as the file size and format restrictions, are specified on the account page.
• For high-quality projects, it is still recommended to retain the lossless master file, and to carry out checks on volume and mixing using professional audio software.

Langlang’s Revised Text

• Langlang’s text rewriting tool can handle texts of up to 8,000 characters, producing rewrite results that can be copied.
• It is suitable for adjusting the colloquial style and wording of voiceovers, but facts, quotes, brand tone, and compliant content still require manual review.

Voice cloning

Cloned voices are deleted by the system once their expiration date arrives; to continue using them, it is necessary to renew before that date. The current public page does not display the unified prices and expiration periods for each option.

Only one’s own voice or a voice for which explicit permission has been obtained can be cloned; it is not allowed to imitate others, bypass identity verification, or use such cloning for deceptive purposes.

Langlang Music Library

• Langlang Music Library offers a search function for music and sound effects; the platform states that all the works available in it are governed by the CC0 Public Domain Dedication License.
• CC0 works can generally be used for commercial purposes by individuals or organizations without the need to give credit, but it is still necessary to keep the page containing details of the specific track as well as the license information before publishing them.
• The CC0 guidelines applicable to music libraries cannot be extended to AI streamers, cloned sound signatures, third-party videos, or user-uploaded content.
• If the work contains recorded performances, trademarks, voices of individuals, or other elements belonging to third parties, the relevant rights must also be assessed separately.

Member and character prices

The page indicates that coupons may result in a lower actual price; the current price and any discounts are subject to those shown on the payment page.

Memberships are virtual products, and no refunds are available once the purchase has been completed. You can contact customer service to obtain an invoice, and points cannot be used to exchange for additional membership credits.

How to use the character quota

• Non-members can generate about 5 hours of audio per month with 50,000 characters; however, the actual duration varies depending on the speaker’s speaking speed and pauses.
• When both regular members and premium members are present, the privileges of the premium member take precedence.
• When users who hold permanent benefits purchase a membership, the platform uses those benefits first.
• Super members have access to both regular and gold-level broadcaster credits; when the credits of the regular broadcasters run out, the gold-level credits are automatically used to cover the shortfall.
• Before submitting a task, check the remaining characters, whether failed tasks are refunded, and the rules regarding character limits should be based on the account records.

Platform and client

Mobile apps offer the possibility to earn points by watching ads; the amount of points earned per view is determined by the advertisers and the available ad inventory, so it isn’t a fixed income.

Open API

Speech synthesis

• The Qianyin Intelligent Open Platform offers access to voice synthesis services; it currently features over 1,800 different voice tones, more than 110 languages, and over 80 different emotional styles.
• The public starting price is 0.3 yuan per 10,000 characters, which represents the lowest possible rate; the actual cost depends on factors such as the specific usage and any business discounts that may apply.

Speech recognition

• The open platform offers multilingual speech recognition, with a starting price of 1 yuan per hour.
• The page claims that the accuracy can reach up to 95%, but the actual results are affected by language, accent, noise, and domain-specific terminology; therefore it cannot be considered a guaranteed figure.

Access requirements

1. Submit an application for integration or business inquiries on the open platform page.
2. Confirm the specific interface scope for text-to-speech, speech recognition, or cloning.
3. Obtain the development documentation, authentication methods, testing quotas, and voice tone identifiers.
4. Check concurrency, rate, file format, timeout, retry on failure, and content review rules.
5. Test quality, latency, stability, and unit cost using real business samples.
6. Before going live, verify the service level, data storage, commercial licensing, and fault support.

SDK and open-source status

• The platform provides public API access points, but the unlogged-in page does not display information regarding authentication, endpoints, error codes, and call restrictions in their entirety.
• Currently, there is no officially released SDK or ready-to-use example projects available.
• It has not been confirmed yet whether the Langlang dubbing website, client, models, or sound library use open-source licenses.
• Third-party repositories with the same name or similar dubbing content do not represent the official Langlang Dubbing team, nor can they be used as evidence that this product is open-source.

Commercial use, copyright, and content responsibilities

• The help center states that users own the copyright to the audio files they create, and can use these synthesized audios for legitimate personal or commercial purposes.
• This note does not automatically resolve third-party rights related to documents, cloned sounds, characters, background music, as well as image and video materials.
• Users must not create any content that violates laws or regulations, and they are responsible for the materials they upload as well as the content they publish.
• For brand advertising, media distribution, and client projects, it is necessary to keep records of orders, tone licenses, material permissions, and generation details.
• When dealing with the cloning of real people’s voices, obtain verifiable authorization, and specify the purpose, channels, duration, geographical scope, and mechanism for revocation.

Privacy and data security

• Registration requires an account, a password, and a SMS verification code; the service may also handle information related to IP addresses, devices, browsing activity, searches, transactions, coupons, and usage records.
• Mobile extensions may request permissions for location, camera, album, microphone, and Bluetooth, which users can disable on their devices.
• The platform may share order, account, device, or location information with affiliated parties and necessary partners in order to provide services.
• The privacy policy states that personal information is stored within China, and is retained in accordance with the purposes for which it was collected as well as legal requirements.
• Users can access, correct, and delete their information, revoke permissions, and request account deletion through the system settings in their personal center.
• Once cancellation is successful, personal information will be deleted or anonymized, unless otherwise specified by laws and regulations.
• The privacy policy was last updated in March 2024; when using new features, it is also necessary to check the immediate permission instructions on the page.

Common fault troubleshooting

• If downloading does not work, switch to another network or use standard browsers such as the newer version of Edge or Chrome.
• When a task fails, check for special characters, emojis, and old code, or switch to another available broadcaster.
• The platform will attempt to carry out a failed task three times within five minutes; it is not advisable to submit the same request repeatedly.
• Tasks remaining in the queue is usually related to the load on the broadcaster model or to queues across the entire system; one can wait or switch to another broadcaster.
• When pronouncing words with silence or sound effects inserted, try placing the effect after a punctuation mark.

Which users are it suitable for

• Creators who produce voiceovers for short videos, advertisements, product descriptions, and informational content.
• A team that creates tweets about novels, audiobooks, radio dramas, and multi-character content.
• Operators who need to convert subtitles or multiple documents into audio in bulk.
• Companies that need to maintain a consistent brand voice or authorized character voices.
• Developers who wish to integrate voice synthesis, recognition, or cloning capabilities through APIs.

Product advantages

• There are many options regarding the host, language, and emotions, and both standard and advanced voice tones are available.
• Multiple users, long texts, subtitles, and batch processing cover the typical content creation workflow.
• Web pages, mobile apps, and WeChat mini-programs share the same account, facilitating use across different devices.
• Free users receive a certain amount of characters per month, while users who use the service less frequently can first test its actual performance.
• The open platform offers synthesis, recognition, and voice cloning, making it suitable for business integration.

Capabilities boundaries and limitations

• AI voiceovers may suffer from mispronunciations, word omission, abnormal pauses, unnatural emotions, and inconsistent volume for different characters.
• Long texts, popular streamers, and peak hours may cause delays or failures; immediate completion cannot be guaranteed.
• Not all streamers support all languages, emotions, and advanced effects.
• There are differences in the rules regarding member characters, broadcaster levels, and event points; it is necessary to check the account benefits before making a purchase.
• No refunds are provided for purchases by members; for long-term packages, it is especially advisable to try them out using the free trial quota first.
• The fact that the generated audio can be used for commercial purposes does not mean that the uploading of the text, as well as the use of cloned voices and related materials, are all authorized.

Frequently Asked Questions

Is there a free version of Langlang Dubbing?

Yes, non-members receive 50,000 ordinary characters on the 1st of each month; some streamers have limited features.

Can the audio generated by Langlang’s voice synthesis be used for commercial purposes?

The platform permits the use of synthetic audio for legitimate commercial purposes, but users must still ensure that the text, voices, music, and other materials have the appropriate rights.

Does Langlang Dubbing support multiple characters?

It is supported – different announcers can be selected for various text segments within the same editor, and adjustments can be made to pauses, pronunciation, and local speaking speed.

How many characters can be entered at one time for a long text?

On the long-text generation page, a maximum of 50,000 characters can be entered at one time, and the output format can be chosen as MP3 or WAV.

What is the difference between regular members and premium members?

Regular members can use the benefits associated with regular streamers, while premium members can use gold or top-tier streamers, and they also have access to both regular and gold-tier streaming avatars.

Can I get a refund after purchasing a membership?

No, the member page clearly states that refunds are not available for virtual products once they have been purchased; it is recommended to try using the free quota first.

Does Langlang Dubbing have a mobile app?

Yes, there are iPhone and Android apps as well as WeChat mini-programs available, and the same account can be used across the web version as well.

Does Langlang Dubbing provide an API?

An open platform is provided for integration, covering text-to-speech, speech recognition, and voice cloning; the complete documentation and business terms must be confirmed as part of the integration process.

Is Langlang Dubbing open-source software?

At present, it has not been confirmed that the website, client, models, or sound libraries are open source; the existence of an API does not mean that the product is licensed under an open source license.

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Summary

Langlang Dubbing allows for expansion from single narration segments to multiple speakers, long texts, subtitles, and bulk content, and it enables the extension of workflows via mobile devices or APIs.

Before official release, it is still necessary to listen to the content in its entirety, check the subtitles, and verify that the audio and related materials have the proper licensing; members with a long-term subscription should purchase the service after attempting a free trial.