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Set volume of speech using effect chain

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This commit is contained in:
Eric Rosenbaum 2018-09-04 21:12:04 -04:00
parent 5dfa4cc691
commit fb7c293e71
1 changed files with 5 additions and 9 deletions
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14
src/extensions/scratch3_text2speech/index.js
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@ -337,17 +337,13 @@ class Scratch3SpeakBlocks {
}
};
this.runtime.audioEngine.decodeSoundPlayer(sound).then(soundPlayer => {
const context = this.runtime.audioEngine.audioContext;
soundPlayer.setPlaybackRate(playbackRate);
soundPlayer.play();
// Increase the loudness of the speech sound
const gainNode = context.createGain();
gainNode.gain.setValueAtTime(2, context.currentTime);
// Note that this connect must be done after play is called,
// which initializes the soundPlayer's output node.
soundPlayer.outputNode.connect(gainNode);
gainNode.connect(this.runtime.audioEngine.inputNode);
// Increase the volume
const engine = this.runtime.audioEngine;
const chain = engine.createEffectChain();
chain.set('volume', 250);
soundPlayer.connect(chain);
soundPlayer.on('stop', resolve);
});