-snip-
As goes the old quote: "I hear and I forget. I see and I remember. I do and I understand."
I for one would very rarely, if ever, listen to an audio file for a number of reasons:
- I can read an awful lot faster than most audio
- I'm not big on downloading random files, which can also sometimes be difficult and slow via VPN and Tor
- If browsing on a mobile device, I'm not wasting limited bandwidth downloading an audio file
- If I'm in a public place, I'm not opening an unknown audio file
Additionally, that's even with the audio file having perfect English and grammar. If the grammar and syntax is poor, it's a lot easier to decipher text than it is audio.