Get really good at vocaloids if this is 100000% where you want to go. Otherwise, find a singer. More on reddit.com

udio.com You can prompt it for styling/genre and apply attributes like "acapella singer", "no instrumentals", etc. It has a section to add lyrics as well, but be aware that it generates parts of the song in 32 second chunks, so you only want to upload the lyrics that would apply to a particular part of the song. So if you want the song to be about 2 minutes, you'd split the lyrics up into 4 segments. If you want a 1 minute song, split into 2 segments. Just be aware that the more lyrics you try to add per 32sec generation, the faster the singer will sing to try and include all the lyrics. The website usually tells you when you've added too many so you should be fine :) They do have a 2 minute generation option instead of 32 seconds, but I dont know if thats a part of the free plan. You get quite a lot of fine tuning options if you pay for the service, but I've got most of the songs I like out of the free tier. (EDIT: I forgot to include that the way you extend the first 32sec generation is via a dedicated "extend" button. It's pretty easy to find. Next to it is a "remix" option. the remix is for if you get an output thats almost to where you want it to be. The remix tweaks it a little bit and provides you a slightly different version) More on reddit.com

A lot of so-called "AI" is just a new name being applied by the marketing department to long standing algorithms connecting to a larger and faster databases. So watch out for the marketing hype, especially with vocal changers. Since I'm into experimental/electronic music and technology in general, I don't have an instinctive hate for AI tech and I've dabbled with various AI music generators. I've found Suno to be the best, so far. But, I think it will be a very competitive area over the next year or two. There are limitations in raw tracks that Suno produces. The sound quality is low and there can be digital artifacts although the v3 Alpha is somewhat better. You don't get a choice of things like key, BPM and so forth beyond what you can prompt in a limited way. The resulting tracks often aren't a great match for what you have in mind and require a reroll. The ChatGPT lyrics it generates are more generic than those done by a corporate marketing committee but at least you can choose to use your own lyrics. As for singing styles, it does do reasonably well there in most cases. The more mainstream the genre and prompt, the better it does. Emotion and nuance is better than you might expect but still lacking. Realism is also better than you might expect but the vocal quality isn't top tier or that unique. The best results can be had by using a tool to split out vocals and instruments into separate tracks and clean them up. More on reddit.com

SynthV or Vocaloid could work. It’s a shit ton of work but it gets you a synthetic voice that you have full creative power over. Check out SynthV Solaria More on reddit.com