The principle is the same as with Stable Diffusion: Thanks to a series of prompts you can generate the content you want.
You may feel frustrated because unlike the other links that i posted below this tool is not local on your computer but server side. To produce some music you need to create a login or with a email or by using a Gmail account. The most basic license allows you to produce something like 20 songs a month, so it is not really a lot. The next license, usable for commercial production is a bit less restrictive, but is subscription-based. Expect recurring payments, even when your project doesn't make money.
On a commercial perspective, i don't find the deal very interesting.
So is it a good tool to produce music ?
I like metal, synth music and things like that and for the things that i like, i find the musical production very decent.
I find the musical loops a bit too repetitive. If you were producing viral web games, this would be decent, i guess.
Here are some ideas of prompts for Stable Audio that i tried:
Aggressive Techno, futuristic, science fiction, fast tempo, energetic, 808 kick, claps, shaker, synthesizer, synth bass, Synth Drones, Ethereal, 165 BPM, Instrumental, electric, war
Aggressive Techno, science-fiction music theme, futuristic, fast tempo, energetic, brutal, 808 kick, claps, shaker, synthesizer, synth bass, Synth Drones, Ethereal, 165 BPM, Instrumental, electric,
Doom metal, ambient music, hope, slow tempo, powerful, peaceful, contemplative, synthesizer, synth bass, Synth Drones, Ethereal, 165 BPM, Instrumental,
Black metal, vivid music, energy, fast paced, powerful, energetic, sport competition, bass guitar, electric guitar, synthesizer, synth bass, Synth Drones, Ethereal, 155 BPM, Instrumental,
Arcade video game, joyful, loop, cute enemies, future-pop, fruity, wind and leaves, ambient, happy, relaxed, water, fruits
I was very happy of the result of this one: You could hear this in a Mario-style game.
Karate video game, energetic, loop, honor, industrial music, electric guitar, futuristic, synthesizer, 165 BPM, sport competition
When i tried this one, it matched more or less what i wanted, but if i find it typically too repetitive (note: You will likely get another song yourself if you try.)
20 prompts to try it is really not enough to play with everything, but it is enough test if this online service to generate AI music fits your need.
If you are looking for another list of prompts: