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Apply sprite's volume to music extension notes and drums (#1735)

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* Use a gain node for volume instead of effects chain

* Use a gain node for volume for drums too
This commit is contained in:
Eric Rosenbaum 2018-11-26 11:46:25 -05:00 committed by GitHub
parent 5802723dc7
commit 045ebb5026
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 15 additions and 10 deletions
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25
src/extensions/scratch3_music/index.js
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@ -886,9 +886,10 @@ class Scratch3MusicBlocks {
}
const engine = util.runtime.audioEngine;
const chain = engine.createEffectChain();
chain.setEffectsFromTarget(util.target);
player.connect(chain);
const context = engine.audioContext;
const volumeGain = context.createGain();
volumeGain.gain.setValueAtTime(util.target.volume / 100, engine.currentTime);
volumeGain.connect(engine.getInputNode());
this._concurrencyCounter++;
player.once('stop', () => {
@ -896,6 +897,10 @@ class Scratch3MusicBlocks {
});
player.play();
// Connect the player to the gain node.
player.connect({getInputNode () {
return volumeGain;
}});
}
/**
@ -997,18 +1002,18 @@ class Scratch3MusicBlocks {
player.take();
}
const chain = engine.createEffectChain();
chain.setEffectsFromTarget(util.target);
// Set its pitch.
const sampleNote = sampleArray[sampleIndex];
const notePitchInterval = this._ratioForPitchInterval(note - sampleNote);
// Create a gain node for this note, and connect it to the sprite's
// simulated effectChain.
// Create gain nodes for this note's volume and release, and chain them
// to the output.
const context = engine.audioContext;
const volumeGain = context.createGain();
volumeGain.gain.setValueAtTime(util.target.volume / 100, engine.currentTime);
const releaseGain = context.createGain();
releaseGain.connect(chain.getInputNode());
volumeGain.connect(releaseGain);
releaseGain.connect(engine.getInputNode());
// Schedule the release of the note, ramping its gain down to zero,
// and then stopping the sound.
@ -1030,7 +1035,7 @@ class Scratch3MusicBlocks {
player.play();
// Connect the player to the gain node.
player.connect({getInputNode () {
return releaseGain;
return volumeGain;
}});
// Set playback now after play creates the outputNode.
player.outputNode.playbackRate.value = notePitchInterval;