I'm looking for this too, do you remember any way to search for it?
Also there's some SFX on envato and some on freesound, but very very few :|
I searched 'moan' on assets forum.
https://f95zone.to/threads/ultimate-sex-sounds-pack-v1-0.39909/#post-3466306
I think I saw it in the development forum as well.
I've been building some atl-animations in renpy with python triggered timed moans (really easy, like 2 lines of code), but it's really hard to find a reasonable amount of samples that sound reasonably like the same person. I've had some success by hiding the differences under layers of other noises. like I made one channel for moans, another for breath noises, third channel for wet noises, fourth channel for music.
I triggered both a moan and a breathing sample simultaneously on parallel choice blocks, so the breathing noise disguises the abrupt moan sample somewhat. also I set a short 0.2 second fadein and fadeout into the channels which also blurred the line where sample begins and ends. wet noises I triggered very faintly at the top & bottom of every penetration so it sounds very convincingly like a dick going in and out of a very tight wet pussy. it's still not perfect, but a low volume music over it all did the trick and the result was VERY good.
the whole goal was to reuse 20 frames in cowgirl, 10 frames going in an 10 out, and trying to get as much non-repetitive animation out of it as possible. so I also went further trying to randomize the samples so your ear doesn't hear that repetition you so easily get from frequently triggered short samples. so I made 4 choice blocks with 1 moan each, so that one of them gets triggered randomly on every animation loop. I also put 4 breathing sounds in 4 choice blocks as well, and separated the moans and breaths in their separate blocks, each group on a paralle block so I can trigger a moan and a breath simulaneously.
(actually I didn't use 4/4 moans but left 1/4 blank so only the breathing sound underneath is there, which gives more variation as the girl doesn't moan on EVERY thrust but sometimes just pants. worked great.)
that was all done with zero work on the samples themselves as a proof of concept kinda thing, with the intention of getting better samples later when I do the same for real. but after spending way too many hours at hunting for better samples and having NO luck whatsoever, I've kinda deduced that we shouldn't even waste our time but instead make our own. like find some ASMR clips with girls masturbating solo, cut out some moans and use those. find the kind of girl voice you need and use only one person from one session so all the moans fit 100%. it's just infinitely less work than finding a good set of samples.
but then I also got another idea watching some deep fake SOUND videos where the AI can use ANY sample person and then regenerate from text OR speech anything you want with PERFECT tone and even accent indistinguishable from your sample. didn't realize how amazing the speech synthesis has gotten in like one year.
anyway the idea was to find the voice you like, maybe a horny pornstar or a celeb, then use it to resynthesize your mismatching samples into 100% matching '1 person sample set'. I couldn't find a decent free version of software to test the idea yet (and I' not gonna payfor something I have no idea if it works) but based on the videos of podcasters using them it seems like it might even be an amazing tool. give all your character individual personal voices fitting to their role by making them each a set of resynthesized samples from your original set. (to clarify I have no interest in making them actually speak words no matter how accurate the synthesis is, but simply use it for timed triggered moans etc to make them sound horny during sex. more of a subtle background thing than in your face.)
okay, no one asked for another wall of text, but I just assume all of us who are looking for sex samples are probably thinking about the same problems. how to get good samples, how to trigger at correct times and how to make it NOT sound like repetitive robot voice. so I hope that helps someone.