How to send audio via the pronunciation assessment api

Question

I'm trying to send a request to the Pronunciation Assessment API in my PHP application, and I'm receiving a 200 response from it, but the body of the response just looks something like this, which is not all that helpful:

{
    "RecognitionStatus": "EndOfDictation",
    "Offset": 5900000,
    "Duration": 0
}

I'm setting up the request like this:

To get the audio, I am doing this in javascript:

const audioBlob = new Blob(this.audioChunks, {'type': 'audio/wav'});
      formData.append('audio', audioBlob, 'recording.wav');
      formData.append('text', this.text);
      axios.post('/api/pronunciation-assessment', formData) ...

And then in PHP I am getting the contents of that passed audio and base64_encodeing it.

This is what I have been able to piece together from different sources on the web, since Azure has no official API documentation for this service as far as I can tell.

Any idea what I'm doing wrong here?

Answer 1

@Dominar el ingles I think you are passing the pronunciation assessment parameters in the body of the request rather than headers. I followed these steps to create a header for assessment parameters using the below snippet from this script and then used them in my POST call through postman.

import requests
import base64
import json

referenceText = "Good morning."
pronAssessmentParamsJson = "\"ReferenceText\":\"%s\",\"GradingSystem\":\"HundredMark\",\"Dimension\":\"Comprehensive\"}" % referenceText
pronAssessmentParamsBase64 = base64.b64encode(bytes(pronAssessmentParamsJson, 'utf-8'))
pronAssessmentParams = str(pronAssessmentParamsBase64, "utf-8")
print(pronAssessmentParams)

Using Postman I selected the audio file required for assessment by selecting binary option as the body.

Copy the Assessment parameter header from the above snippet and use it in the request below as seen along with other parameters.

As observed, the response contains the result and the assessment of reference text with the scores. I hope this helps!!

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