The main purpose of NoteRealistic is to bring more realistic sounds to Minecraft. At this point it supports most of the sounds which are related to the terrain (e.g. swimming and weather) but sounds for mobs are still a work in progress. The idea is certainly great but in my opinion I think it can be better fine-tuned. Some sounds like the walking steps too noisy. But for a first release it's definitely pretty good!
Sound packs are best described with a video and that's why I recorded one which you can watch down below. It doesn't showcase all sounds (I'll leave that to real YouTubers to do!) but it should give you an idea of what to expect.
Here is a list of sounds you'll notice changes for in-game:
- Random sounds
- Download Resource .McPack
- Open Minecraft PE
- Settings > Global resources > Activate pack