title: Playing Low and High Pitch Audio over specific Time and transitioning between Pitches
body: <p>I'm trying to add audio features to my app.</p>
  
  <p>I need to play a high pitch sound and a low pitch sound for a specific amount of time (a few seconds) and furthermore a transition between a low pitch and a high pitch over a specific amount of time.</p>
  
  <p>For example: play 2s low pitch -> transition low pitch to heigh pitch over 1s -> 2 high pitch -> tranistion high to low pitch over 1s -> repeat.</p>
  
  <p>Is there a specific term what I'm looking for? Is there a plugin that enables these features and if not how could I implent something like this myself?</p>