Has any programmer advance-configured pico2wave?

[bkpsusmitaa]

man pico2wave is a very short file.
Has any programmer advance-configured pico2wave? Beyond its default capabilities?
I have reached up to this step, but not this step.
Only that this file:

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speech-dispatcher

mentioned to be in:

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/etc/defaults

that says:

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RUN=no

is rather in

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/etc/default

with the said line, i.e.,

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RUN=yes

and has to be edited to:

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RUN=no

I have installed the necessary package, libttspico0, and can have pico2wave read from CLI, for instance:

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 pico2wave -w lookdave.wav "Look Dave, I can see you're really upset about this." && aplay lookdave.wav

I can also use the following script (attached) for a very small file:

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./speak.sh "$(cat hello.txt)"

, if I have the small hello.txt file in the same folder as the script file. There is a # of Character upper Limit for the txt file.

The speak.sh file being:

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#!/bin/bash
# How to Use this script to read a txt file?
# 
# Then run it with the desired text:
# speak.sh "hello world"

# or read the contents of an entire file:
# speak.sh "$(cat <filename>)"

echo "./speak.sh \"\$(cat filename)\""
pico2wave -l=en-US -w=/tmp/test.wav "$1"
aplay /tmp/test.wav
rm /tmp/test.wav

But I can't alter pico2wave -'s sampling rate to 48000. It only samples at 16000Hz.
Any suggestions?

Later ...
It was later learnt that pico2wave used SVOX binary from Google. I thanked Dr. Samuel Thibault and the Debian Accessibility Team for porting the said binary to Debian, on the 31st of August 2018. I was informed that

The libttspico library itself doesn't seem to have an interface to change the sampling rate, actually.

So let us wait with expectation from Team Debian on a future implementation of the SVOX package or something even better.