Displays blog post reading times and generates premium AI voice audio narrations using OpenAI TTS with local caching.

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Nilo Velez

tobifjellner (Tor-Bjorn “Tobi” Fjellner)

Norse Digital Group LLC

Peter Smits

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Hans Henrik Juhl

cyrfer

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Johannes Jülg

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sangarstudio

Sangar Studio ReadFlow is a premium, high-fidelity WordPress plugin designed to elevate the user reading and auditory experience on your website. It calculates the reading time of your posts based on custom speed parameters and inserts a gorgeous, glassmorphic player widget that lets users listen to posts.
By integrating directly with OpenAI’s state-of-the-art TTS models, Sangar Studio ReadFlow converts your blog content into natural, fluid, human-like voice recordings. It handles OpenAI’s character limitations gracefully by dividing long essays into sentence-aware blocks and stitching the audio binaries together seamlessly.
To protect your budget and increase speed, Sangar Studio ReadFlow features a robust local caching system. It generates the voice file only once per post and caches it directly inside your server’s uploads directory. Every subsequent listener loads the audio instantly in a custom-designed web player.
If no API Key is provided, or if the API suffers a network failure, the plugin automatically falls back to the Web Speech API SpeechSynthesis, providing free, zero-config native voice synthesis directly inside the reader’s browser.
<h3>Key Features</h3>
<ul>
<li>Accurate Reading Time Indicator: Computes reading times based on custom Words Per Minute (WPM) settings.</li>
<li>Premium Custom HTML5 Player: Ditch the default browser audio bar. Features stylized play/pause buttons, loading spinners, sound-wave animations, and draggable seek sliders.</li>
<li>OpenAI TTS Integration: Access six natural voices (Alloy, Echo, Fable, Onyx, Nova, Shimmer) with standard <code>tts-1</code> or high-definition <code>tts-1-hd</code> qualities.</li>
<li>Unlimited Text Length Chunking: Sentence-intelligent text-splitting bypasses API size caps for infinite post narration.</li>
<li>Smart Local Caching: Saves generated MP3s locally. Zero repetitive API billing overhead for repeat readers.</li>
<li>Auto Pre-Generation: Optional setting pre-renders post narration in the background as soon as you hit “Publish”.</li>
<li>Sleek Administration Panel: Manage credentials, customize accent colors, adjust reading formulas, check cache sizes, test voices with live playback, and flush files with one click.</li>
<li>Zero-Config Web Speech Fallback: Universal native voice narration fallback if AI models are disabled or run out of quota.</li>
<li>Adjustable Playback Velocity: Speed options (<code>0.8x</code>, <code>1.0x</code>, <code>1.2x</code>, <code>1.5x</code>, <code>2.0x</code>) for listeners on the go.</li>
<li>Direct MP3 Download Link: Give readers the option to take post narrations with them.</li>
</ul>
<h3>Privacy & Third-Party Service Disclosure</h3>
This plugin integrates with and sends requests to a third-party service: OpenAI API (specifically the Text-to-Speech service).
<ul>
<li>What is sent: Only the plain text content of your published posts is transmitted to OpenAI’s servers to synthesize the voice.</li>
<li>What is NOT sent: No reader IP addresses, personal data, browser details, or cookies are sent to OpenAI.</li>
<li>Data Processing & Storage: The audio generation is executed server-side. The compiled MP3 is saved locally on your self-hosted WordPress site inside <code>/wp-content/uploads/sangar-studio-readflow/</code>. No external CDN or tracking tags are embedded in the reader’s browser.</li>
<li>OpenAI Terms: For more details on data retention policies, please check the OpenAI Privacy Policy: https://openai.com/policies/privacy-policy</li>
</ul>

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