The Cognitive Services Speech SDK has no sound on iPhone's Safari, but can play successfully on Mac's Safari. How should this be handled?

@jessebo Given that you're using the web version of React Native, the complexities could be related to how React Native handles the web view and the compatibility of the Speech SDK with it. Here are a few steps to troubleshoot and potentially resolve the issue:

Ensure Correct Player Selection

Verify Player Initialization: Ensure the player is correctly initialized and set up for the web view environment. In some environments, the player might not be recognized correctly.

Manual Player Check: Manually check if the player is correctly assigned and valid before using it.

Adjust for React Native Web Environment

React Native for Web has some differences in how it handles certain browser APIs. Ensure your environment can support and correctly load the required functionalities.

Refactored Code for React Native Web

Here is a more tailored approach considering the React Native Web complexities:

import React, { useState, useEffect, useRef } from 'react';

import * as SpeechSDK from 'microsoft-cognitiveservices-speech-sdk';

const SpeechComponent = () => {

  const [synthesizer, setSynthesizer] = useState(null);

  const [subscriptionKey, setSubscriptionKey] = useState('YOUR_SUBSCRIPTION_KEY');

  const [region, setRegion] = useState('YOUR_REGION');

  const [voice, setVoice] = useState('en-US-JennyNeural');

  const [format, setFormat] = useState('Audio16Khz32KBitRateMonoMp3');

  const [text, setText] = useState('Hello, this is a test.');

  useEffect(() => {

    const speechConfig = SpeechSDK.SpeechConfig.fromSubscription(subscriptionKey, region);

    speechConfig.speechSynthesisVoiceName = voice;

    speechConfig.speechSynthesisOutputFormat = format;

    const player = new SpeechSDK.SpeakerAudioDestination();

    

    // Check if the player is correctly initialized

    if (player) {

      console.log('Player initialized');

    } else {

      console.error('Player not initialized');

    }

    player.onAudioStart = () => {

      console.log('playback started');

    };

    player.onAudioEnd = () => {

      console.log('playback finished');

    };

    const audioConfig = SpeechSDK.AudioConfig.fromSpeakerOutput(player);

    const newSynthesizer = new SpeechSDK.SpeechSynthesizer(speechConfig, audioConfig);

    setSynthesizer(newSynthesizer);

    newSynthesizer.synthesizing = (s, e) => {

      console.log(e);

      // Handle synthesizing event

    };

    newSynthesizer.synthesisStarted = (s, e) => {

      console.log(e);

      // Handle synthesis started event

    };

    newSynthesizer.synthesisCompleted = (s, e) => {

      console.log(e);

      // Handle synthesis completed event

    };

    newSynthesizer.SynthesisCanceled = (s, e) => {

      const cancellationDetails = SpeechSDK.CancellationDetails.fromResult(e.result);

      let str = "(cancel) Reason: " + SpeechSDK.CancellationReason[cancellationDetails.reason];

      if (cancellationDetails.reason === SpeechSDK.CancellationReason.Error) {

        str += ": " + e.result.errorDetails;

      }

      console.log(e);

      // Handle synthesis canceled event

    };

    return () => {

      newSynthesizer.close();

    };

  }, [subscriptionKey, region, voice, format]);

  const startSynthesis = () => {

    if (synthesizer) {

      synthesizer.speakTextAsync(

        text,

        result => {

          if (result.reason === SpeechSDK.ResultReason.SynthesizingAudioCompleted) {

            console.log('Synthesis finished.');

          } else {

            console.error('Speech synthesis canceled, ' + result.errorDetails);

          }

        },

        error => {

          console.error(error);

        }

      );

    } else {

      console.error('Synthesizer not initialized');

    }

  };

  return (

    <div>

      <h1>Speech Synthesis Test</h1>

      <textarea value={text} onChange={(e) => setText(e.target.value)} />

      <button onClick={startSynthesis}>Start Synthesis</button>

    </div>

  );

};

export default SpeechComponent;

Additional Debugging Tips

1. Check Audio Context: Ensure the browser allows audio playback, especially in the case of Safari on iPhone, which has strict autoplay policies.
2. User Interaction: Ensure the synthesis function is called in response to a user action, such as a button click, to comply with autoplay policies.
3. Environment Checks: Check for any specific differences in how React Native for Web handles audio elements compared to a standard web environment.

Final Steps

1. Manual Player Initialization: If the player still doesn't work, manually debug if player is correctly initialized by logging its properties and methods.
2. Fallback Options: Consider using a different audio output method or creating a more custom player if the default one fails on iOS Safari.

By following these steps and adjustments, you should be able to narrow down the issue and find a working solution for integrating Azure Cognitive Services Speech SDK with React Native for Web. Additional Debugging Tips

1. Check Audio Context: Ensure the browser allows audio playback, especially in the case of Safari on iPhone, which has strict autoplay policies.
2. User Interaction: Ensure the synthesis function is called in response to a user action, such as a button click, to comply with autoplay policies.
3. Environment Checks: Check for any specific differences in how React Native for Web handles audio elements compared to a standard web environment.

Final Steps

1. Manual Player Initialization: If the player still doesn't work, manually debug if player is correctly initialized by logging its properties and methods.
2. Fallback Options: Consider using a different audio output method or creating a more custom player if the default one fails on iOS Safari.

By following these steps and adjustments, you should be able to narrow down the issue and find a working solution for integrating Azure Cognitive Services Speech SDK with React Native for Web.