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class="detail-header-content-block"><h1 class="title">deepgram_speech_to_text 2.3.2 <span class="pkg-page-title-copy"><img class="pkg-page-title-copy-icon filter-invert-on-dark" src="/static/hash-o6oemknr/img/content-copy-icon.svg" alt="copy "deepgram_speech_to_text: ^2.3.2" to clipboard" width="18" height="18" title="Copy "deepgram_speech_to_text: ^2.3.2" to clipboard" data-copy-content="deepgram_speech_to_text: ^2.3.2" data-ga-click-event="copy-package-version"/><div class="pkg-page-title-copy-feedback"><span class="code">deepgram_speech_to_text: ^2.3.2</span> copied to clipboard</div></span></h1><div class="metadata">Published <span><a class="-x-ago" href="" title="Aug 13, 2024" aria-label="3 months ago" aria-role="button" role="button" data-timestamp="1723539092692">3 months ago</a></span> • <a class="-pub-publisher" href="/publishers/zealousfoundry.com"><img class="-pub-publisher-shield filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-verified.svg" alt="verified 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role="button">Example</a></li><li class="detail-tab tab-link detail-tab-installing-title"><a href="/packages/deepgram_speech_to_text/install" role="button">Installing</a></li><li class="detail-tab tab-link detail-tab-versions-title"><a href="/packages/deepgram_speech_to_text/versions" role="button">Versions</a></li><li class="detail-tab tab-link detail-tab-analysis-title"><a href="/packages/deepgram_speech_to_text/score" role="button">Scores</a></li></ul></div></div><div class="detail-container detail-body-main"><div class="detail-tabs-content"><section class="tab-content detail-tab-readme-content -active markdown-body"> <p>A Deepgram client for Dart and Flutter, supporting all Speech-to-Text and Text-to-Speech features on every platform.</p> <p>You need something else ? Feel free to create issues, contribute to this project or to ask for new features on <a href="https://github.com/tempo-riz/deepgram_speech_to_text" rel="ugc">GitHub</a> !</p> <h2 class="hash-header" id="features">Features <a href="#features" class="hash-link">#</a></h2> <p>Speech to text (STT) transcription from:</p> <ul> <li>Local file, remote URL, Raw data</li> <li>Streaming audio</li> </ul> <p>Text to speech (TTS) is also supported</p> <ul> <li>Text to raw audio data</li> </ul> <h2 class="hash-header" id="getting-started">Getting started <a href="#getting-started" class="hash-link">#</a></h2> <p>All you need is a Deepgram API key. You can get a free one by signing up on <a href="https://www.deepgram.com/" rel="ugc">Deepgram</a></p> <h2 class="hash-header" id="usage">Usage <a href="#usage" class="hash-link">#</a></h2> <p>First create the client with optional parameters</p> <pre><code class="language-dart">String apiKey = 'your_api_key'; Deepgram deepgram = Deepgram(apiKey, baseQueryParams: { 'model': 'nova-2-general', 'detect_language': true, 'filler_words': false, 'punctuation': true, // more options here : https://developers.deepgram.com/reference/listen-file }); </code></pre> <p>Then you can transcribe audio from different sources :</p> <h2 class="hash-header" id="stt-result">STT Result <a href="#stt-result" class="hash-link">#</a></h2> <p>All STT methods return a <code>DeepgramSttResult</code> object with the following properties :</p> <pre><code class="language-dart">class DeepgramSttResult { final String json; // raw json response final Map<String, dynamic> map; // parsed json response into a map final String? transcript; // the transcript extracted from the response final String? type; // the response type (Result, Metadata, ...) non-null for streaming } </code></pre> <h2 class="hash-header" id="file">File <a href="#file" class="hash-link">#</a></h2> <pre><code class="language-dart">File audioFile = File('audio.wav'); DeepgramSttResult res = await deepgram.transcribeFromFile(audioFile); // or transcribeFromPath() if you prefer print(res.transcript); // you can also acces .json and .map (json already parsed) </code></pre> <h2 class="hash-header" id="url">URL <a href="#url" class="hash-link">#</a></h2> <pre><code class="language-dart">final res = await deepgram.transcribeFromUrl('https://somewhere/audio.wav'); </code></pre> <h2 class="hash-header" id="raw-data">Raw data <a href="#raw-data" class="hash-link">#</a></h2> <pre><code class="language-dart">final res = await deepgram.transcribeFromBytes(List.from([1, 2, 3, 4, 5])); </code></pre> <h2 class="hash-header" id="stream">Stream <a href="#stream" class="hash-link">#</a></h2> <p>let's say from a microphone :</p> <pre><code class="language-dart">// https://pub.dev/packages/record (other packages would work too) Stream<List<int>> micStream = await AudioRecorder().startStream(RecordConfig( encoder: AudioEncoder.pcm16bits, sampleRate: 16000, numChannels: 1, )); final streamParams = { 'detect_language': false, // not supported by streaming API 'language': 'en', // must specify encoding and sample_rate according to the audio stream 'encoding': 'linear16', 'sample_rate': 16000, }; </code></pre> <p>then you got 2 options depending if you want to have more control over the stream or not :</p> <pre><code class="language-dart">// 1. you want the stream to manage itself automatically Stream<DeepgramSttResult> stream = deepgram.transcribeFromLiveAudioStream(micStream, queryParams:streamParams); // 2. you want to manage the stream manually DeepgramLiveTranscriber transcriber = deepgram.createLiveTranscriber(micStream, queryParams:streamParams); transcriber.stream.listen((res) { print(res.transcript); }); transcriber.start(); // you can pause and resume the transcription (stop sending audio data to the server) transcriber.pause(); // ... transcriber.resume(); // then close the stream when you're done, you can call start() again if you want to restart a transcription transcriber.close(); </code></pre> <h2 class="hash-header" id="text-to-speech">Text to speech <a href="#text-to-speech" class="hash-link">#</a></h2> <pre><code class="language-dart">Deepgram deepgram = Deepgram(apiKey, baseQueryParams: { 'model': 'aura-asteria-en', 'encoding': "linear16", 'container': "wav", // options here: https://developers.deepgram.com/reference/text-to-speech-api final res = await deepgram.speakFromText('Hello world'); print(res.data); // raw audio data that you can use as you wish. Check flutter example for a simple player }); </code></pre> <p>For more detailed usage check the <code>/example</code> tab</p> <p>There is a full flutter demo <a href="https://github.com/tempo-riz/deepgram_speech_to_text/tree/main/example/flutter_example" rel="ugc">here</a></p> <p>Tested on Android and iOS, but should work on other platforms too.</p> <h2 class="hash-header" id="debugging-common-errors">Debugging common errors <a href="#debugging-common-errors" class="hash-link">#</a></h2> <ul> <li>make sure your API key is valid and has enough credits</li> </ul> <pre><code class="language-dart">deepgram.isApiKeyValid() </code></pre> <ul> <li>"Websocket was not promoted ..." : you are probably using wrong parameters, for example trying to use a whisper model with live streaming (not supported by deepgram)</li> <li>empty transcript/only metadata : if streaming check that you specified encoding and sample_rate properly and that it matches the audio stream</li> <li>double check the parameters you are using, some are not supported for streaming or for some models</li> </ul> <h2 class="hash-header" id="additional-information">Additional information <a href="#additional-information" class="hash-link">#</a></h2> <p>I created this package for my own needs since there are no dart sdk for deepgram. Happy to share !</p> <p>Don't hesitate to ask for new features or to contribute on <a href="https://github.com/tempo-riz/deepgram_speech_to_text" rel="ugc">GitHub</a> !</p> <h2 class="hash-header" id="support">Support <a href="#support" class="hash-link">#</a></h2> <p>If you'd like to support this project, consider contributing <a href="https://github.com/sponsors/tempo-riz" rel="ugc">here</a>. Thank you! :)</p> </section></div></div></div><aside class="detail-info-box"><a class="packages-scores" href="/packages/deepgram_speech_to_text/score"><div class="packages-score packages-score-like"><div class="packages-score-value -has-value"><span class="packages-score-value-number">19</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">likes</div></div><div class="packages-score packages-score-health"><div class="packages-score-value -has-value"><span class="packages-score-value-number">160</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">pub points</div></div><div class="packages-score packages-score-popularity"><div class="packages-score-value -has-value"><span class="packages-score-value-number">90</span><span class="packages-score-value-sign">%</span></div><div class="packages-score-label">popularity</div></div></a><h3 class="title">Publisher</h3><p><a href="/publishers/zealousfoundry.com"><img 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href="/packages/deepgram_speech_to_text/license">license</a>)</p><h3 class="title">Dependencies</h3><p><a href="/packages/http" title="^1.2.1">http</a>, <a href="/packages/universal_file" title="^1.0.0">universal_file</a>, <a href="/packages/web_socket_channel" title=">=2.4.0 <4.0.0">web_socket_channel</a></p><h3 class="title">More</h3><p><a href="/packages?q=dependency%3Adeepgram_speech_to_text" rel="nofollow">Packages that depend on deepgram_speech_to_text</a></p></aside></div><script type="application/ld+json">{"@context":"http\u003a\u002f\u002fschema.org","@type":"SoftwareSourceCode","name":"deepgram\u005fspeech\u005fto\u005ftext","version":"2.3.2","description":"deepgram\u005fspeech\u005fto\u005ftext - A Deepgram client for Dart and Flutter, supporting all Speech-to-Text and Text-to-Speech features on every platform.\u000a","url":"https\u003a\u002f\u002fpub.dev\u002fpackages\u002fdeepgram\u005fspeech\u005fto\u005ftext","dateCreated":"2024-03-15T14\u003a59\u003a44.328787Z","dateModified":"2024-08-13T08\u003a51\u003a32.692090Z","programmingLanguage":"Dart","image":"https\u003a\u002f\u002fpub.dev\u002fstatic\u002fimg\u002fpub-dev-icon-cover-image.png","license":"https\u003a\u002f\u002fpub.dev\u002fpackages\u002fdeepgram\u005fspeech\u005fto\u005ftext\u002flicense"}</script></div><div class="detail-metadata"><h3 class="detail-metadata-title"><span class="detail-metadata-toggle">←</span> Metadata</h3><div class="detail-info-box"><a class="packages-scores" href="/packages/deepgram_speech_to_text/score"><div class="packages-score packages-score-like"><div class="packages-score-value -has-value"><span class="packages-score-value-number">19</span><span class="packages-score-value-sign"></span></div><div class="packages-score-label">likes</div></div><div class="packages-score 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class="link" href="https://github.com/tempo-riz/deepgram_speech_to_text" rel="ugc">Repository (GitHub)</a><br/><a class="link" href="https://github.com/tempo-riz/deepgram_speech_to_text/issues" rel="ugc">View/report issues</a><br/></p><h3 class="title">Documentation</h3><p><a class="link" href="/documentation/deepgram_speech_to_text/latest/">API reference</a><br/></p><h3 class="title">License</h3><p><img class="inline-icon-img filter-invert-on-dark" src="/static/hash-o6oemknr/img/material-icon-balance.svg" alt="" width="14" height="14" role="presentation"/>MIT (<a href="/packages/deepgram_speech_to_text/license">license</a>)</p><h3 class="title">Dependencies</h3><p><a href="/packages/http" title="^1.2.1">http</a>, <a href="/packages/universal_file" title="^1.0.0">universal_file</a>, <a href="/packages/web_socket_channel" title=">=2.4.0 <4.0.0">web_socket_channel</a></p><h3 class="title">More</h3><p><a href="/packages?q=dependency%3Adeepgram_speech_to_text" rel="nofollow">Packages that 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