UPDATE: It appears that the files below all belong to the Dimension Pro installation, but there are no .prog files associated with them (so they will not load in DP even if they are moved). However, they do have 187 .sfz files embedded, which will open and play the samples using sfozando or the ARIA Player.
 
The issue I noted in this thread with the ARIA player turned out to be a mismatch in the associated .dll files between sforzando and the ARIA player. This was resolved by uninstalling them all and only loading the ARIA player (the ARIA player is a beefed up version of sfozando used by Garritan). IIRC, I had sforzando installed first on my old machine, then the ARIA player; when I installed sforzando after the ARIA player was when I got the problems noted in this thead.
 
----Original Post below----
Hi all. I just reinstalled SONAR (manual installation from downloads), and when I began sorting things, I noticed a C:\Multisamples folder with these contents:
 
I installed all content, so both Rapture and Dimension Pro are installed. The Garritan Pocket Orchestra only had one subdirectory and file (->Woodwinds->OboeSolo.sfz) which I *thought* was a fix to Dimension Pro at some point, but the other directories do not match names. I ended up copying this to both the Rapture and Dimension Pro Multisample folders, but after a refresh (F5), these do not show up, and I cannot find any associated .prog files (they are all in Cakewalk Sound Center, DropZone, Rapture, and Dimension Pro), so even with Multisamples loaded they will not run anyway.
 
 
Anyone know offhand what program installed these and where the .prog are? I ended up moving this folder to another drive and nothing gave me a fit about it, so I am curious where they came from.
 
FYI to folks about reloading DimPro and Rapture - since we have received a truckload of freebies over the years, it is far simpler to just install the synth and copy over a backup of your Multisamples (C:\Program Files\Cakewalk\Dimension Pro [or Rapture]) and Programs (C:\ProgramData\Cakewalk\Dimension Pro [or Rapture]) subdirectories for each synth. It saves worrying about re-installing all of those installers. If you have loaded a LOT of things over the years, it is highly recommended to make backups of those directories.

dim pro i reckon, but you could prolly find for sure out via the registry?

Of the two Dpro and Rapture - this looks like Dpro although I do not recall Rapture Scapes in DPro.
I have one massive Multisample folder. It is hard for me to tell the source of the files.
 

http://forum.cakewalk.com/Dimension-Pro-Two-different-multisamples-locations-m2371784.aspx

Hmmm, I assumed this was DimPro, but the prog files are not present (banks 26-98 do not show up in the DimPro browser), *and* my DimPro browser has different names -  05 - Drums, 13 - Leads, 18 - Splits, 19 - Drum Grooves. These all have prog files that load into DimPro. The ones in the OP do not.
 
I installed DimPro to a bare slate, and used the default (C:\Program Files\Cakewalk\Dimension Pro\Multisamples) directory, and *most* of everything installed there (around 4GB).
 
Is this from the DimPro installer I used (I used 1.5.5.16 (newest), but have a others I kept)?

If it is a mix of DPro and Rapture (and it looks like that to me), that would point to Rapture Session/Pro. If the folder is part of an installed product and not copied there by hand, the path would be in the registry and would tell you which synth installed them. C:\Multisamples is not a default path for any Cakewalk synth.

scook
C:\Multisamples is not a default path for any Cakewalk synth.

tru dat, looks like an error in the installer

pwalpwal
http://forum.cakewalk.com/Dimension-Pro-Two-different-multisamples-locations-m2371784.aspx

Yeah, I seem to remember going through this a while ago, and way back when I actually unpacked the DimPro installers, since only the main installer prompts for locations (the others "just go," and there are several of them). My dp registry entry points to the C:\Program Files\Cakewalk\Dimension Pro\Multisamples directory (I actually searched the registry for a pointer to C:\Multisamples last night but didn't find one - forgot to mention that in the OP).
 
@scook, yeah, the "Rapture Scapes" made me think it might be Rapture Session, but that did not prompt an install directory from me. I do not use it enough to know.
 
I still have my Win7 machine up, so ended up copying the Multisamples/Programs folders from that. I do not use Rapture Session much, but the BIG installers that it came with all load fine. At this point is more curiosity, since I must have removed the C:\Multisamples from the other machine too and won't miss it in the long run.

Assuming it was an error in one of the installers which defaulted to that path, just try renaming the stray multisamples folder temporarily, so that whatever installed it there recently cannot find it. 
 
Then insert each synth and try to load the presets, and see which one has missing samples.  Simples! 

Rapture Session/Pro use SampleDataDir in HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software. The default value is C:\Cakewalk Content\Cakewalk Sample Data but the default will float depending on the Command Center setting for "Cakewalk Content" (this value is stored in ContentDir in HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software).  Both Rapture Session and Pro use the "Rapture Pro" folder in SampleDataDir. The multisample folder is under "Rapture Pro." So, the full default path to the multisample folder for Rapture Session/Pro is C:\Cakewalk Content\Cakewalk Sample Data\Rapture Pro\Multisamples