Linux/espeak

Female voice

espeak -ven-us+f5 -s120 "test"

"Use the -v option to specifiy a voice. After that you can provide the type of language, such as en or en-us. After that, add a plus, then either m or f, and a 1 – 5. The s option lets you set the speed. Unfortunately, most of the voices sound pretty bad"

Ref: [1]

Fix Alsa warnings

Edit /usr/share/alsa/alsa.conf and comment out each error line

#pcm.front cards.pcm.front
pcm.front cards.pcm.default

Install jackd:

sudo apt-get --no-install-recommends install jackd2
# jackd -d alsa

Background the process:

jackd -d dummy 2>/dev/null 1>/dev/null &

# alt background the process
jackd -p 8 -r -m -d dummy 1>/dev/null 2>&1 &

Ref: [2] [3]