TTS Custom Lexicon is not applied

Question

I am trying to apply a custom lexicon to the Text-to-Speech service. Here is my lexicon file:

<?xml version="1.0" encoding="UTF-8"?>

<lexicon version="1.0"
      xmlns="http://www.w3.org/2005/01/pronunciation-lexicon"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.w3.org/2005/01/pronunciation-lexicon
      http://www.w3.org/TR/2007/CR-pronunciation-lexicon-20071212/pls.xsd"
      alphabet="x-sampa" xml:lang="sv-SE">
    <lexeme>
        <grapheme>BTW</grapheme>
        <alias>By the way</alias>
    </lexeme>
    <lexeme>
        <grapheme>😀</grapheme>
        <alias>test emoji</alias>
    </lexeme>
</lexicon>

It is uploaded to blob storage and I can access the URI (link). I also tried with a SAS link that i created, and that is also accessible to me via the browser: (link)

Now I am trying to apply my lexicon to a TTS service call using Python and the speech SDK.

import os
import azure.cognitiveservices.speech as speechsdk

region = os.environ.get("SPEECH_REGION")
subscription_key = os.environ.get("SPEECH_KEY")
speech_config = speechsdk.SpeechConfig(subscription=subscription_key, region=region)
speech_synthesiser = speechsdk.SpeechSynthesizer(speech_config=speech_config)
uri = "https://ttslexica.blob.core.windows.net/tts-lexica/sv-SE_lexicon.xml"
ssml = f"""<speak xmlns="http://www.w3.org/2001/10/synthesis" xmlns:mstts="http://www.w3.org/2001/mstts" xmlns:emo="http://www.w3.org/2009/10/emotionml" version="1.0" xml:lang="sv-SE"><voice name="sv-SE-SofieNeural"><lexicon uri="{uri}" />😀</voice></speak>"""

result = speech_synthesiser.speak_ssml(ssml)

This I expect the output to read "test emoji", but what I hear is "flinande ansikte" ("grinning face" in Swedish), the default name of the 😀 emoji.

Since I don't hear the expected result, it would be nice if I could find some information about any lexicon applied or not in the SpeechSynthesisResult object saved as the variable result.

1. How do I succeed in making my lexicon apply to the request I am making?
2. Is there any way of checking whether a blob file was accessed, e.g. from the Storage account view on Azure portal?

Answer 1

We are fixing it, will notify when the fix is deployed.