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| function amplify(node, gain) { | |
| const audioCtx = new AudioContext(); | |
| const source = audioCtx.createMediaElementSource(node); | |
| // create a gain node | |
| const gainNode = audioCtx.createGain(); | |
| gainNode.gain.value = gain; | |
| source.connect(gainNode); | |
| // connect the gain node to an output destination |