CODEWITHSUNDEEP
iosobjective-ctext-to-speech
Antonio
Antonio

Reputation: 434

make iOS text to speech work when ringer is muted

I am calling iOS text to speech in a pretty standard way:

static AVSpeechSynthesizer* synthesizer = NULL;
//...
+(void)readText:(NSString*)text
{
    if(synthesizer == NULL)
    synthesizer = [[AVSpeechSynthesizer alloc] init];
    AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:text];
    utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"fr-FR"];
    [synthesizer speakUtterance:utterance];
}

It does the job, except for one issue: when the ringer is muted on device, text to speech is muted too. How do I make it work even when the ringer is muted?

Upvotes: 1

Views: 792

Answers (3)

user1482450
user1482450

Reputation:

Thanks to Leo Cavalcante. After setting AVAudioSession setCategory and others, it solves my problem.

I have added swift code below. 

do {
        try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default)
        try AVAudioSession.sharedInstance().setActive(true)
       // try AVAudioSession.sharedInstance().overrideOutputAudioPort(.speaker)
    } catch let error as NSError {
        print("audioSession error: \(error.localizedDescription)")
    }

Upvotes: 1

Antonio
Antonio

Reputation: 434

iOS audio session categories are the correct answer for this: https://developer.apple.com/library/content/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/AudioSessionCategoriesandModes/AudioSessionCategoriesandModes.html.

The default value is AVAudioSessionCategorySoloAmbient, but if the audio functionality is central for the app (our case), it should be set to AVAudioSessionCategoryPlayback:

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];

Upvotes: 3

Leonardo Cavalcante
Leonardo Cavalcante

Reputation: 1303

Just unmute the device

static AVSpeechSynthesizer* synthesizer = NULL;
//...
+(void)readText:(NSString*)text
{
    if(synthesizer == NULL)
    synthesizer = [[AVSpeechSynthesizer alloc] init];
    AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:text];
    utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"fr-FR"];

    //Add the following code to active audio
    NSError *setCategoryErr = nil;
    NSError *activationErr  = nil;
    [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error:&setCategoryErr];
    //magic is here
    [[AVAudioSession sharedInstance] setActive:YES error:&activationErr]; 

    //speech your text
    [synthesizer speakUtterance:utterance];
}

Upvotes: 1

Related Questions