CastReader Voice APIUSE CASES
The API provides voices, short-text synthesis and downloadable audio. These eight workflows show what you can build now, and what your application needs to add.
Turn article excerpts, newsletters and story passages into audio your readers can save and replay.
Submit one short passage per job. For English, optionally request timestamps to drive word or word-group highlighting.
Extract document text, split long articles and manage the playlist in your app. Alignment can be unavailable; keep ordinary playback as a fallback.
Related API guide →Give vocabulary cards, example sentences and short lessons a consistent voice, with reusable audio for practice.
Provide the lesson text and matching language. MP3 supports speed from 0.5 to 2; save each generated example with its learning card.
Pronunciation scoring, speech recognition and phoneme dictionaries are not provided. Review teaching materials before publication.
Related API guide →Generate narration for short videos, product explainers and campaign scripts. Take the finished audio into your editor.
Choose a voice in the console, reuse its regional ID and submit each script as a job. Retrieve the audio file when it completes.
Video editing, lip sync, music and sound effects remain in your production tools. Style tags describe a voice; they are not emotion controls.
Related API guide →Use one recognizable voice for onboarding, guided steps, accessibility prompts and spoken notifications.
Generate common messages ahead of time, retain the files in your app and play them when the relevant event occurs.
This is audio generation, not push delivery or telephony. No real-time response or safety-critical alert latency is guaranteed.
Related API guide →Turn localized scripts into speech for different audiences while reusing your chosen voice.
Supply text already written in a supported language and send its language code. Confirm voice support and keep its ID in the selected region.
The API does not translate or infer language from the website locale. The console can help detect text language; ambiguous or mixed text may need an explicit choice.
Related API guide →Give game characters, story roles or a brand a recurring voice. Produce each role’s lines with its own voice ID.
Choose catalog voices or create an authorized private voice. Keep a role-to-voice map and generate each line separately.
Dialogue ordering, pauses and audio assembly belong in your app. Native multi-speaker generation and text-to-voice design are not provided.
Related API guide →Add spoken output to an existing text assistant or knowledge-base application.
Generate the answer with your own system, split it into supported text lengths and submit speech jobs. Play completed files.
The service supplies TTS only, not an LLM, microphone input, turn detection or interruptible real-time conversation.
Related API guide →Add a repeatable audio-production step to a CMS, course builder or internal publishing tool.
Create short jobs within workspace limits, persist job IDs, poll with backoff and download results before retention expires.
Batch scheduling, storage and publishing are your application’s responsibility. There is no native unlimited bulk or long-book endpoint.
Related API guide →Emotion instructions, laughter or sound-effect tags, pronunciation dictionaries, text-to-voice design, multi-speaker projects, automatic translation and video dubbing are not exposed API capabilities. Voice-library style tags are descriptive filters, not request parameters.
Real-time conversations, interruptible playback, public streaming and native long-form or unlimited batch generation are not available in the current public release. Pre-generate time-sensitive audio; do not assume a latency SLA.
Use only voices and content you are authorized to use. A supported integration pattern is not a guarantee that every voice will fit every language or production style; audition the actual output.