HD audio (Rachel)
214 sections covered
HD Rachel recordings play where available. Your device voice covers the rest, with one saved backup voice and speed for every Listen button.
214 sections covered
System default
1× speed
Let your device choose automatically
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A real covered cheat sheet section from the HD library.
A short Web Speech sample using the selected backup voice.
Cheat sheet sections, review groups, questions, and explanations can play aloud. HD audio is used first unless you choose backup voice only.
Listening + reading at the same time activates two memory paths — recall is stronger than either alone.
First pass: 0.75× or 1×. Once you know the concept, 1.5×–2× for rapid review.
Listen on the way to work, walking, doing chores. Volume of practice matters as much as quality.
Apple ships premium neural voices. On other devices, the default voice still works — change it in your OS speech settings.
Tap any new Listen button — it auto-stops the previous one. The × button stops audio immediately.