Past few days I have been working on a ISR sample editor. It gives a nice visualization of the samples and more.
Below you can find a a demonstration video using the ISR sample editor to add a loop to samples and modifying a few bins to improve the sound a bit. I might be a bit boring to watch, but I thought, let's just post it anyway for curious ones 
Realfun 3 ISR sample editor
Nice! I can see how tweaking some small frequency variations and the waveform shift can clean up the sound further, and adding things like looping really turns them from samples into instruments. And it’s cool to see some non-vocal samples in action too. Maybe amplitude could be another interesting parameter to tweak? So that e.g. in that one waveform with an attack (@3:47) you could copy the second sample into the first, and then lower the amplitude so that it has a cleaner waveform but still preserves the attack, perhaps tweak it to be a bit smoother, etc.
Also nice to see some editing action in Realfun, I wouldn’t mind seeing more of that occasionally. Because from the videos so far, even if they are a pleasure to listen to and sometimes they would give a brief glimpse of a waveform view, it hasn’t been really clear to me yet what I’m looking at at those moments, what all the numbers mean and how they can be manipulated. So this I find this live tweaking interesting to see.
Maybe amplitude could be another interesting parameter to tweak?
Yes, I still exploring what other useful tweaks I can add here. Of course it will always be possible to copy the wave form to the wave editor, adjust (e.g. amplitude) there and then copy it back (as I did for the rock organ).
The test musics and the samples you are editing sound great!
Thanks! With all the testing and experimentation I do I got very skilled at creating short loops
The tubular bell sample seems a bit far fetched though, out of the SCC reach I suppose. But other samples turn out pretty OK, either directly from the encoder or with occasional tweaking.
Wow, amazing result! I love it. 
Awesome! Great work!
This player with this kind of songs have to become the bgm of a msxdev game 
![afbeelding van [WYZ]](https://es.msx.org/sites/default/files/imagecache/avatar-comment/avatars/picture-775.png?v=1470481363 "afbeelding van [WYZ]")
Super cool! And the real-time transposing without affecting sample duration is something Amiga Paula chip users can be jealous of .