Slices are saved in *.slc files that are stored in the same folder with the associated WAV file. These are non-editable binary files at the moment until I figure out a more permanent solution for a good audio marking file format.
We talked about this before here:
Slice using computer?
AFAIK, the only “standard” marking support that WAV has is the CUE chunk:
Supposedly Reaper lets you edit these but I haven’t tried it yet and I don’t know of any other programs. What software are you using that allows you to edit the CUE chunks in a WAV file?
I agree that the WAV-embedded CUE chunks would be nice to support as an importable format but it is not a good format to work with since editing slices means editing the WAV file. As far as I can tell, there is just no obvious standard for audio meta data supported by a wide array of programs to leverage, unfortunately.
So the best route I’ve been able to identify is to store slices in a separate file that uses simple extensible and open format based. If someone wants to go ahead and design such a file format then I will gladly implement into the ER-301 firmware. Otherwise, we have to wait until I get around to it.