Pronunciation assessment results missing in Android build (C# Unity)

Hi all! I’m trying to implement pronunciation assessment in an Android Unity app, and have been unsuccessful in getting any pronunciation results from SpeechRecognitionEventArgs.

I was successful in getting pronunciation results when running on my Windows machine (within Unity Editor).

What could be causing this error?

Here is my RecognizedHandler code:

    private void RecognizedHandler(object sender, SpeechRecognitionEventArgs e)
    {
        
        if (e.Result.Reason == ResultReason.RecognizedSpeech)
        {

            pronunciationString = "";
            recognizedString = $"{e.Result.Text}";

            // Function is unable to progress from here on in Android build:
            var pronunciationResult = PronunciationAssessmentResult.FromResult(e.Result);
            
            pronunciationString += string.Format(
                "Accuracy score: {0}, Pronunciation score: {1}, Completeness score : {2}, FluencyScore: {3} \n",
                pronunciationResult.AccuracyScore, pronunciationResult.PronunciationScore,
                pronunciationResult.CompletenessScore, pronunciationResult.FluencyScore);
            pronunciationString += "\n Word level details \n";
            
            foreach (var word in pronunciationResult.Words)
            {
                pronunciationString += string.Format("Word: {0}, Accuracy score: {1}, Error type: {2}", word.Word,
                    word.AccuracyScore, word.ErrorType);
                
                foreach (var phoneme in word.Phonemes)
                {
                    pronunciationString += string.Format("Phoneme: {0}, Phoneme AccuracyScore: {1} \n",
                        phoneme.Phoneme, phoneme.AccuracyScore);
                }
            }
        }
        if (e.Result.Reason == ResultReason.NoMatch)
        {   
           Debug.Log($"NOMATCH: Speech could not be recognized.");
        }
    }

Any help will be much appreciated!

[pankopon]

@yulin-li Any status update, or is the suggested workaround still the only way to go?

[yulin-li]

Hi @aidenkoh801, sorry for the late reply. I am investigating the issue. Meanwhile, as a work around, you can parse the raw json string in your codes (using result.Properties.GetProperty(PropertyId.SpeechServiceResponse_JsonResult);)