CODEWITHSUNDEEP
javaandroidtext-to-speech
Nero
Nero

Reputation: 1048

Control the volume on TextToSpeech function call

Hi guys

I've been looking around but cannot seem to find a suitable answer to integrate into my function. I am basically using the following code currently: 

    private void sayHello(String timeString) {

    textToSpeech.speak(timeString,
    TextToSpeech.QUEUE_FLUSH,
    null);
}

This code works fine but it's too loud and it can only be controlled by the volume of the device itself. I want to be able to adjust/hardcode/be able to use spinner to control the volume of the TTS but cannot seem to do so accordingly.

Is this functionality available for this library? Is it achievable?
I've also tried to implement the following into my code: 

KEY_PARAM_VOLUME

However, I cannot see any examples of this being used and it's showing up with the error to create a function. Any advice?

Upvotes: 2

Views: 2095

Answers (2)

BrucePlumb
BrucePlumb

Reputation: 1

Years ago I asked Anki (Damien) for the ability to set volume of TTS. He put it on a list of things to consider but nothing has been done since. Is it that difficult a problem? And I can't believe more people aren't asking for volume control. I have a downloaded deck of Italian cards with audio and my cards play that audio followed by 2 TTS voices to hear three different pronunciations. Unfortunately the TTS is much louder so I either hurt my ears or I can't hear the downloaded audio. The answer provided by Trusty Turtle looks good but I use a Mac and an iPad. I don't know enough programming to translate the code myself. Ideally there should be a generalized version handling any OS. Looks like I have to be patient a few more years.

Upvotes: 0

Nerdy Bunz
Nerdy Bunz

Reputation: 7437

public class MainActivity extends AppCompatActivity {

    int androidAPILevel = android.os.Build.VERSION.SDK_INT;
    TextToSpeech tts;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tts = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
            @Override
            public void onInit(int i) {
                start();
            }
        });
    }

    private void start() {
        if (androidAPILevel < 21) {
            HashMap<String,String> params = new HashMap<>();
            params.put(TextToSpeech.Engine.KEY_PARAM_VOLUME, "0.5"); // change the 0.5 to any value from 0-1 (1 is default)
            tts.speak("This is a volume test.", TextToSpeech.QUEUE_FLUSH, params);
        } else { // android API level is 21 or higher...
            Bundle params = new Bundle();
            params.putFloat(TextToSpeech.Engine.KEY_PARAM_VOLUME, 0.5f); // change the 0.5f to any value from 0f-1f (1f is default)
            tts.speak("This is a volume test.", TextToSpeech.QUEUE_FLUSH, params, null);
        }
    }
}

Upvotes: 5

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