>any info on text-to-speech
I'm not quite sure what you're asking, the above post has the example commands for installing espeak then using it on ubuntu. Run all those commands in a terminal window. I.E. type
sudo apt-get install espeak
at a terminal prompt to install the espeak application, then you can make .wav files with by simply typing
espeak -w voice-output-file.wav "this is an example for extreme brainlets"
The above command will create a file named "voice-output-file.wav" in whatever directory you are currently in. By default it will put the file into your ~ folder, also known as the "home" directory. Navigate to the home directory with your file manager and you will find the wav file. You can change the filename above to whatever you like, and also the text inside the quotes to make it say what you want. Typing "man espeak" and "espeak --voices" will give you more info for customization.
Now that you have your wav file, you can either compress it to mp3 using Audacity or FFmpeg, or use the wav file directly in Kdenlive when making webm memes. For illustration purposes, I converted the above file to mp3 with Audacity so I can post it here. See attachment.