@Changeling17
There’s the fic background pony #0100 wrote in this comment section, at least

@Scp-3125
Dang. Interesting story. I wonder if there’s a fanfic about it.

@Changeling17
She’s creating for herself the perfect girlfriend, I’m guessing

What kind of experiment is happening here?

@Background Pony #19FE  
If she fixes that machine she could usher in a new era for Equestriakind by creating multiple geniuses with the the morals of harmony deeply rooted into the them, and with enough mental difference between eachother as to provide different analytical/creative views

Octavia pressed a series of buttons on the computer console and drank a sip of tea.
 
“They all said the perfect partner for was out there somewhere. But they were wrong! Why waste time dating ponies with pitifully conventional morality when the perfect partner is in here! Designer cloning is the best way to create the perfect little wife.” Octavia presses more buttons and operates sliders.
 
“I really just need somepony to cook and clean up around the house and not challenge me and my attitudes and beliefs so let’s see… ‘Demure’ is the key word here. She’ll be have a calm, quiet personality, be well behaved and a little bit submissive so she’ll listen to everything I say, and strongly love classical music. She’ll like waking up early like me and… low libido. That sounds good.”
 
Octavia takes another sip of tea and, setting the teacup down on the console, turns to regard the cloning tube. “Yes, with all my hard work up to this point, absolutely nothing can go wrong. It’s all going according to-” Octavia turns around in time to see her teacup slide off the top of the console and fall down onto the computer which short-circuits! Sparks fly in all directions, smoke rises up, and there’s a BANG!
 
Red lights start flashing and warning sirens start blaring and a robotic voice with an unnecessarily sophisticated accent comes on the overhead speakers “Warning. Warning. Malfunction. Emergency decanting procedure initiated.” Hoses and wires pop off of the cloning tube and the bottom drops off, spilling gallons of bright green Cloning Fluid in all directions.
 
The white form of the clone pony slides out across the floor, stopping at the hooves of the frozen Dr. Melody. She looks down at the unicorn as her eyes open.
 
“Ow, wow, what a real motheryayer of a headache. It feels like some yay took his yay and yayed my eyesocket until it…” She looks up and sees Dr. Melody’s horrified expression. She raises an eyebrow. “Well hey there, hot-stuff. How you doin’?” The clone pony gets to her hooves and smooths back her mane, getting clone juice everywhere. “What’s your name sweet-cakes?”
 
“D-Doctor Octavia Melody.”
 
“Huh, Doctor Octy? How about I just call you Octy? Hey, I gotta say I’m happy you’re here because I can get a little lonely when I’m a-clone.” She grins, awaiting a response.
 
Octavia facehoofs. “I’ve created a monster…”
 
“Well now that I broke the ice between us, I gotta say I am so bored, do you know if there’s a good party around here or something? You and me could get some drinks, do a little dancing, see where the night takes us…?” She swung a leg across Octavia’s shoulders, getting green fluid all over her lab coat and perfectly groomed back mane.
 
“I should never have tried to play Celestia!!”

“They said I was mad… but soon, I’ll have created the ultimate DJ! And then we’ll see who will have the last wub. Mwahahahahah!”

“Don’t worry, Vinyl, we’ll revive you just as soon as we’ve found a cure for seventeen stab wounds in the back.”