title: android TextToSpeech: getting the audio time length
body: <p>I'm working in android using the <strong>TextToSpeech</strong> class and Have a string with and specific length. I want to calculate the estimated time of this generated text to speech audio (I know that i can get the audio and then get the time length of this generated audio but I want to explore other alternatives). </p>
  
  <p>I'm trying getting the <strong>speechRate</strong> (but seems no posible) and the with the length of the String create some formula getting as result an estimation of the time.</p>
  
  <p>Any sugestions??</p>
  
  <p>Thanks in advance.</p>
  
  <p>PD: About the spechRate: <a href="https://stackoverflow.com/questions/11954874/getspeechrate-or-how-to-tell-what-rate-tts-is-currently-set-at">getSpeechRate()? (or how to tell what rate TTS is currently set at)</a></p>