Sound Parameters on Net Installer? Need speech for accessibility

[Dave Hunt <dahunt@posteo.de>]

I am trying to get software speech to work on the Stretch net installer, 
on a machine having multiple sound output possibilities.  When typing 
's', and pressing enter, at the boot prompt/beep, I am expecting spoken 
prompts for the installer, but get silence, except for the beeping boot 
prompt.  Can I pass boot parameter(s) to force the installer to use my 
alsa sound device for this output?


I am blind, and need the speech to make the installer accessible; I've 
no access to a braille display.



Thanks,



Daid