Sound falling off when asked to speak aloud
When it plays a phrase for me to speak aloud, the sound falls off near the end (short phrases are unaffected, longer phrases have the end inaudible). Next time it says something, the sound starts off inaudible, and quickly raises to normal volume. In the event of two "say the phrases" questions in a row, the second one will pick up, then fall off again. All other sound plays fine.
Has anyone else experienced this/know a solution?