How to use the standardized-audio-context.OfflineAudioContext function in standardized-audio-context

import { OfflineAudioContext } from 'standardized-audio-context';

const offlineAudioContext = new OfflineAudioContext(1, 1, 44100);

export const loadFixtureAsAudioBuffer = (fixture) => fetch(`/base/test/fixtures/${ fixture }`)
    .then((response) => response.arrayBuffer())
    .then((arrayBuffer) => offlineAudioContext.decodeAudioData(arrayBuffer));

export function createOfflineAudioContext(channels: number, length: number, sampleRate: number): OfflineAudioContext {
	return new stdOfflineAudioContext(channels, length, sampleRate) as unknown as OfflineAudioContext;
}