This is a very interesting idea that almost comes off. Load the
demonstration tape, and your Spectrum speaks recognisable words.
It will read out numbers produced at random, call red alert,
and so on, in response to data produced by a Basic program.
The second side of the tape allows you to set up words of
your own, using a sound tape of the words, but this process is
very difficult to carry through effectively.
The volume level of the recorded signal must be exactly
right, and the actions involved need to be precisely timed.
Perhaps with more time and patience, a better result might have
been achieved.
The carefully-detailed instructions unfortunately contained
some minor problems, such as an instruction to GOTO a non-existent
line.
While that was not important in practice, there was a definite
problem over the editor routine used to set up new words, in that
after an error it was necessary to re-enter the editor. As a guess,
the form RANDOMISE USER EDIT was tried, and it worked.