Set playbackRate on hearthis.at

bookmarklet.js

;(function() {
  const sm = window.soundManager
  const soundId = sm.soundIDs[0]
  const playBackward = -15

  const askPlaybackRate = () => {
    console.log(sm.getSoundById(soundId))
    sm.setPlaybackRate(
      soundId,
      window.prompt('set playbackRate', sm.getSoundById(soundId).playbackRate || 1) || 1
    )
  }

  const setPosition = (sec) => {
    sm.setPosition(soundId, sm.getSoundById(soundId).position + sec * 1000)
  }

  const onKeydown = (e) => {
    if (e.key !== 'F12') return
    setPosition(playBackward)
  }

  if (soundId) {
    askPlaybackRate()
    window.addEventListener('keydown', onKeydown)
  } else {
    alert('no sound')
  }
})()