I went through the Feature Requests and noticed that this desired feature has been around for a longer time. There were four requests in total for the same idea in different queues. I chose the most voted one, so if you feel like this is the feature you need, vote it here 
Have text & audio match / auto sync
But at the same time, a question for you @zoran or @mark , have you had any discussions at LingQ about adding this kind of feature to some platform (my wish Android)?
I put here the other Feature Requests (votes in total when writing this 18,10,4,2 = 34) which are considering the same problem. So, if you some day have extra time to ponder the next feature to be implemented 
, please take them into consideration:
And finally this feature suggestion (from Support & Feedback forum) which can’t straight found from the Feature Requests: