let’s start converting Speech/voice To Text in Nodejs

Follow the steps:

Step 1: Register on Bluemix (IBM Cloud Plateform)

We need to register on the Bluemix.

Step 2: Login on Bluemix

After the registration, let's login there.

Step 3: Crete a service for speech-to-text. And get the username and password for speech-to-text.

Link : Create service for speech to text.
After creating the service, we need to start the coading part.

Start coding:

Now this time we need to write codes.

Step 4: Create a speech.js file and require speech-to-text and fs just like below code:

                          var SpeechToTextV1 = require(‘watson-developer-cloud/speech-to-text/v1’);
                          var fs = require(‘fs’);

In the above code, we are importing the servise from "‘watson-developer-cloud/speech-to-text/v1" and also importing the "fs".

Step 5: Create an object of SpeechToText just like below code:

                        var speech_to_text = new SpeechToTextV1({
                          username: ‘1234567–8765–4267–9e76-fgff34f’,
                          password: ‘ABCdefghiJK’
                        });
                      

In the above code, we are configuring the service using predefine usernamea and password.

Step 6: Create an array and insert the path of the audio. You can have many audio file in this array:

var files = [‘./music/hello.flac’,’./music/somebody2010.flac’];

Here we have two audio file "./music/hello.flac" and "/music/somebody2010.flac", we have created an array of files. we'll use this "files" to conver audio to the text format.

Step 7: Create params for every audio, So we will do it in for loop and call speech_to_text.recognize() to convert.Get the response and console it.

                        for (var file in files) {
                          var params = {
                            audio: fs.createReadStream(files[file]),
                            content_type: ‘audio/flac’,
                            timestamps: true,
                            word_alternatives_threshold: 0.9,
                            keywords: [‘colorado’, ‘tornado’, ‘tornadoes’],
                            keywords_threshold: 0.5
                        };
                        
                        speech_to_text.recognize(params, function (error, transcript) {
                          if (error)
                            console.log(‘Error:’, error);
                          else{
                            console.log(JSON.stringify(transcript, null, 2));
                            console.log(transcript.results[0].alternatives[0].transcript);
                          } 
                        });
                      }
                      

In the above code, we are itearing over files and preaparing the "params". And this params is being used in the "speech_to_text" service.

Congratulation ! You did it.

The complete code is here :

                        //speech.js
                        var SpeechToTextV1 = require(‘watson-developer-cloud/speech-to-text/v1’);
                        var fs = require(‘fs’);
                        var speech_to_text = new SpeechToTextV1({
                          username: ‘1234567–8765–4267–9e76-fgff34f’,
                          password: ‘ABCdefghiJK’
                        });
                    
                        var files = [‘./music/hello.flac’,’./music/somebody2010.flac’];
                        for (var file in files) {
                          var params = {
                            audio: fs.createReadStream(files[file]),
                            content_type: ‘audio/flac’,
                            timestamps: true,
                            word_alternatives_threshold: 0.9,
                            keywords: [‘colorado’, ‘tornado’, ‘tornadoes’],
                            keywords_threshold: 0.5
                        };
                    
                        speech_to_text.recognize(params, function (error, transcript) {
                          if (error)
                            console.log(‘Error:’, error);
                          else
                            console.log(transcript.results[0].alternatives[0].transcript);
                        });
                      }
                      

---

Steps to run the app:

                        INSTRUCTIONS:
                        Step 0: Check the environment setup. (Should installed nodejs,Remove all errors if any).
                        Step 1: Navigate terminal/command prompt to this directory.
                        Step 2: Run command: node FILE_NAME.js;
                        Step 3: See the message in console log;
                        Step 4: if executed Step 3 successfully then you have text message according to audio. Otherwise go to Step 0.