[Blindapple] How to make ProDOS system programs talk

[Kyle]

I have a ProDOS disk with system programs on it that I have copied to a 
hard disk image. The problem is that executing any system program stops 
speech. Yes, even basic.system is affected. That problem is easy enough 
to solve, because startup, which is the default BASIC program that 
starts with basic.system can start with a line that says

0 PRINT CHR$(4) "BRUN TEXTALKER"

or otherwise,

BRUN TEXTALKER

can be typed blindly at a prompt. The Davex shell specifically looks for 
pt.obj in the same folder where it runs, but then running any other 
system program from the shell again stops speech until the system 
program is terminated. I don't seem to recall having this problem with 
the software I had back in the day when I used an Apple //e at school, 
but there must have been something obvious that I knew of then that I 
have since forgotten. Is there any way at all to run system utilities, 
for example from the latest ProDOS 4.2.2 disk, and keep Textalker 
running at the same time or force it to be reloaded so that system 
utilities actually speak?

~Kyle