Definition
Web Audio API defines OfflineAudioContext
[Exposed=Window]
interface OfflineAudioContext : BaseAudioContext {
constructor(OfflineAudioContextOptions contextOptions);
constructor(unsigned long numberOfChannels, unsigned long length, float sampleRate);
Promise<AudioBuffer> startRendering();
Promise<undefined> resume();
Promise<undefined> suspend(double suspendTime);
readonly attribute unsigned long length;
attribute EventHandler oncomplete;
};