Learning interactions and text to speech

Thank for your quick response!  I created the text to speech in the slide notes, opened up the learning interaction, opened the content where I'm to add the audio, chose add audio, located the Text to Audio file in the library and when I clicked Ok it says I have selected the wrong file type. The text to speech file (text to audio) states that its a wav file, but it doesn't recognize it as such.  It seems I have to edit the Text to Audio file (text to speech), click on podcast, save file name as a.wav file, then repeat the steps above for it to add to the interaction. The other thing I noticed is when I want to add the new text to speech it wants to change the audio on the slide. When I say yes it incorporates all the text to speech notes on one audio file. Make sense?