![]() querySelector ( "#playButton" ) const volumeControl = document. Js // Useful UI elements const playButton = document. The solution is simple, and it involves using an audio node type that, at first glance, doesn't look all that useful: ConstantSourceNode. Still, there are two drawbacks to doing it that way: first, that's extra code that, as you're about to see, you don't have to write and second, that loop uses valuable CPU time on your thread (likely the main thread), and there's a way to offload all that work to the audio rendering thread, which is optimized for this kind of work and may run at a more appropriate priority level than your code. You could use a loop and change the value of each affected AudioParam one at a time. For example, perhaps you have a set of oscillators, two of which need to share the same configurable volume, or you have a filter applied to specific inputs but not all of them. You may sometimes want multiple audio parameters to be linked so they share the same value while being changed somehow. This article demonstrates how to use a ConstantSourceNode to link multiple parameters together so they share the same value, which can be changed by setting the value of the ConstantSourceNode.offset parameter. Example and tutorial: Simple synth keyboard. ![]() Controlling multiple parameters with ConstantSourceNode.Background audio processing using AudioWorklet.Advanced techniques: Creating and sequencing audio.
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