[Sprint  Galaxy Note 4 Android Development] samep:
Good suggestion to install the Samsung Notes and look for updates but did you uninstall it after extraction and then install from extraction folder? (To clarify, Root Explorer extracts to an extract folder by default).

My experience was odd because I installed in /data/app with the simple illustrated instructions at bottom but initially I still got the stop notification when saving. I'm not sure, maybe a reboot before opening application would have made a difference? Missed that opportunity.

Immediately after that, I opened Samsung App but it needed an update. I updated that and looked for updates but didn't see Samsung Notes but S Note. It's not the same app but installing that and looking for other updates, all I found was an update for English translation. I updated that and opened both apps. They now work without stopping but are separate apps.

I'm slightly confused as to why it works now but I've got two apps. I'm no Samsung app guru but usually shy away from Samsung apps that already have a similar Android or when a better alternative third party app equivalent exists. LOL.

Regarding your ViPER4Android install, did you install in /system/app? V4A typically doesn't work installed as sideload app when it installs in /data/app but these apk's that aren't packed to install in system won't likely function if trying to push to system or move to system. But it could also be due to permission not granted for storage or you may need a permissive kernel. If not installing V4A as zip with script that modifies media server with permission to run V4A and adding certain operating parameters to build.prop, V4A may not work as expected or without opening app when needed; it's annoying to run in such fashion- the volume may unexpectedly get very loud. V4A install for successful operation has gotten complex with system-less root and possibly Magisk when using Marshmallow.

I can recommend an alternative V4A mod but there's another supported in the modset aroma script you could try. Not sure but selecting anything but stock sound in original flash of modset may require a clean install? I'd defer to [MENTION=4904853]carlosggb[/MENTION] for that clarification. But be aware, there could be complications from trying more than one sound mod or flashing over sound mods. Most sound mods will recommend flashing over stock sound only.

https://xdaforums.com/showthread.php?p=57021246

I do know the aroma script that [MENTION=1503720]tx_dbs_tx[/MENTION] did for Ultimate Note 5 ROMs allowed the ability to change sound by running aroma script again. You could revert to stock sound to flash an alternative sound mode but alternate sound modes other than the aroma script aren't supported. Much effort and testing was put into work by tx_dbs_tx.

Honestly, all alternative sound mods should have disclaimers as not supported but flash at risk only. To avoid cluttering thread with unnecessary posts, posting an issue with unsupported sound mod should be avoided. Not to point you out, maybe you weren't aware of the possible issues with alternative sound mods. V4A was easily added to KitKat ROMs but got complicated in lollipop and more so in marshmallow.

I would prefer a clarification from developers on the subject for conversation purposes. It's a timely topic not previously discussed that I'm aware of. Sorry if I've missed that somewhere.