alt and title

Is there a rationale for separating spoken and read texts?

Looking over the updated 'radio' page at peepo:

http://www.peepo.com/alfi/radio.html

We  use: "heart 1 o 6.2" though this obviously reads strangely.

Authors presumably need some control that the user can over-ride.

thanks

jonathan chetwynd
peepo project manager