How to use the virtual-audio-graph.delay function in virtual-audio-graph

const updateAudioGraph = virtualAudioGraph => ({
  delayTime,
  dryLevel,
  feedback,
  highCut,
  lowCut,
  pingPong,
  wetLevel,
}) => virtualAudioGraph.update({
  0: gain('output', {gain: wetLevel}),
  1: stereoPanner(0, {pan: -1}),
  2: stereoPanner(0, {pan: 1}),
  3: delay([2, 8], {delayTime, maxDelayTime}),
  4: gain(3, {gain: feedback}),
  5: delay(pingPong ? [1, 3] : [0, 8], {delayTime, maxDelayTime}),
  6: biquadFilter(5, {frequency: highCut}),
  7: biquadFilter(6, {frequency: lowCut, type: 'highpass'}),
  8: gain(7, {gain: feedback}),
  9: gain('output', {gain: dryLevel}),
  input: gain([8, 9], {gain: 1}, 'input'),
})

const updateAudioGraph = virtualAudioGraph => ({
  delayTime,
  dryLevel,
  feedback,
  highCut,
  lowCut,
  pingPong,
  wetLevel,
}) => virtualAudioGraph.update({
  0: gain('output', {gain: wetLevel}),
  1: stereoPanner(0, {pan: -1}),
  2: stereoPanner(0, {pan: 1}),
  3: delay([2, 8], {delayTime, maxDelayTime}),
  4: gain(3, {gain: feedback}),
  5: delay(pingPong ? [1, 3] : [0, 8], {delayTime, maxDelayTime}),
  6: biquadFilter(5, {frequency: highCut}),
  7: biquadFilter(6, {frequency: lowCut, type: 'highpass'}),
  8: gain(7, {gain: feedback}),
  9: gain('output', {gain: dryLevel}),
  input: gain([8, 9], {gain: 1}, 'input'),
})

const paramsToGraph = ({tapeSpeed, feedbackAmount, reader1Position, audioBuffer, mix, lowpass}) => {
  //ensure a new node is created each time
  const bufferSourceDry = `bufferSourceDry${new Date().getTime()}`;
  const bufferSourceWet = `bufferSourceWet${new Date().getTime()}`;
  return {
    master: gain('output', {gain: 0.7}),
    dry: gain('master', {gain: normDry(mix)}),
    wet: gain('master', {gain: normWet(mix)}),
    feedback: gain(['delay'], {gain: normFeedback(feedbackAmount)}),
    lowpass: biquadFilter(['feedback', 'wet'], {type: 'lowpass', frequency: normFrequency(lowpass)}),
    delay: delay('lowpass', {delayTime: normDelay(reader1Position)}),
    [bufferSourceDry]: bufferSource('dry', {buffer: audioBuffer, loop: true}),
    [bufferSourceWet]: bufferSource('delay', {buffer: audioBuffer, loop: true, playbackRate: normSpeed(tapeSpeed)}),
  };
};