Typescript error "Type 'string' is not assignable to type 'AudioEncoding'"

Environment details

• OS: OS X Catalina 10.15.2
• Node.js version: v13.5.0
• Typescript version: 3.7.2
• npm version: 6.13.4
• @google-cloud/text-to-speech version: 2.1.0

Steps to reproduce

I’m was using the demo code, which worked fine until I updated the library from 0.5^ to 2.1.^

import {TextToSpeechClient} from  '@google-cloud/text-to-speech'

  const client = new TextToSpeechClient({
    projectId: 'PROJECT_ID',
    keyFilename: googleKey,
  });

  // Construct the request
  const request = {
    input: {
      text: text
    },
    // Select the language and SSML Voice Gender (optional)
    voice: {
      languageCode: 'fr-FR',
      name: "fr-FR-Wavenet-A",
      ssmlGender: "NEUTRAL",
    },
    // Select the type of audio encoding
    audioConfig: {
      audioEncoding: 'LINEAR16',
      sampleRateHertz: 8000,
    },
  };

const response = await client.synthesizeSpeech(request);

But now with this code, Typescript is complaining :

Argument of type ‘{ input: { text: string; }; voice: { languageCode: string; name: string; }; audioConfig: { audioEncoding: string; sampleRateHertz: number; }; }’ is not assignable to parameter of type ‘ISynthesizeSpeechRequest’. The types of ‘audioConfig.audioEncoding’ are incompatible between these types.

Argument of type ‘{ input: { text: string; }; voice: { languageCode: string; name: string; ssmlGender: string; }; audioConfig: { sampleRateHertz: number; }; }’ is not assignable to parameter of type ‘ISynthesizeSpeechRequest’. The types of ‘voice.ssmlGender’ are incompatible between these types. Type ‘string’ is not assignable to type ‘SsmlVoiceGender’.

I got it working with this :

import * as protos from "@google-cloud/text-to-speech/build/protos/protos"

const request = {
    input: {
      text: text
    },
    // Select the language and SSML Voice Gender (optional)
    voice: {
      languageCode: 'fr-FR',
      name: "fr-FR-Wavenet-A",
      ssmlGender: protos.google.cloud.texttospeech.v1.SsmlVoiceGender.NEUTRAL,
    },
    // Select the type of audio encoding
    audioConfig: {
      audioEncoding: protos.google.cloud.texttospeech.v1.AudioEncoding.LINEAR16,
      sampleRateHertz: 8000,
    },
  }

[meowlanguages]

If somebody has any similar problems, below I posted some workaround, what I found on https://westa.io/@alclimb/fp9o

THANKS TO AUTHOR, YOU SAVED MY LIFE

import dotenv from "dotenv"
import * as fs from "fs-extra"
import { TextToSpeechClient, protos } from "@google-cloud/text-to-speech"

dotenv.config({ path: `./.secrets/.env` })
main()

async function main() {
    const client = new TextToSpeechClient()
    const request: **protos.google.cloud.texttospeech.v1.ISynthesizeSpeechReques**t = {
        input: { text: `hello, world!` },

        voice: { languageCode: `en-US`, name: `en-US-Wavenet-D` },
        audioConfig: {
            audioEncoding: `MP3`,
            pitch: 0.00,
            speakingRate: 1.00
        },
    }
    const [response] = await client.synthesizeSpeech(request)
    fs.writeFileSync(`output.mp3`, response.audioContent, `binary`)

    console.log(`Audio content written to file: output.mp3`)
}

[alexander-fenster]

This fix was released, enums now accept strings.