Albus offer audio narrations from text in two quality options. When you click 'Audio narration' icon on hover menu or select it from right-click menu, you will see 'Standard' and 'Advanced' options. 'Advanced audio' option provides more humane, life-like voices with several tone varieties.
You can also download the audio narrations as .mp3 files. Click 'download narration' icon on hover menu or select the same option from right-click menu on an audio narration block.