Sorry if this is a long post, but I think some background is necessary.
Prior to the other day, I was running Win/XP SP3 under Fusion 5 on my 27" iMac, which has OS X 10.7.5. On the Win/XP guest I run a Windows-only ham radio application called NaP3. My ham radio transceiver is connected to the XP guest via (1) USB for frequency and mode controls, and (2) the iMac's Line In jack on the back. The radio has a special output port that acts sort of like a microphone - difficult to explain here. Anyway, the data going into the Line In jack is input by the NaP3 application which produces a graphical display of a "segment" of the frequency band that the radio is tuned to. This allows the user to "see" where there are stations operating on that band without the need to tediously tune across the band searching. The NaP3 application has the ability to display up to 192 kHz worth of frequency "segment" at a time. Notice that I said "up to". It turns out the the built in "sound card" in the iMac is capable of only 48 kHz bandwidth. I had tried an external USB sound card (E-MU 0204) and that failed miserably in the Mac/VMware/WinXP environment. So, I settled on having only the 48 kHz width displayed. Still pretty darn good and way better that not having the app working at all. It -was- working fine.
A few days ago I said "uncle" and decided to go to Win 8. My first step was to upgrade to Fusion 6. Then, I built a new Windows 8 guest, upgraded it to Windows 8.1, installed my applications, installed VMware tools, and tried out NaP3. Ughhhhh - now, instead of seeing 48 kHz worth of the frequency spectrum, I'm only seeing 15 - 20 or so. Tried all sort of combinations in the application's configuration but could not get that 48 kHz display back. So, in an attempt to see exactly what my settings were on the XP guest, I shut down the Win 8.1 guest and booted up the previously working Windows/XP. The first thing it did was to re-install VMware tools on the XP guest - this was the first time that guest had been run on Fusion 6. After the tools were installed, I fired up my NaP3 application. Well, crap - NOW it gives me the same crummy 15 - 20 kHz display. I'm leaning very, very heavily on the problem being either VMware 6 itself or the tools. When this was on Fusion 5 everything worked. Now it is on 6 with the V6 tools and it doesn't work - on Win/XP or Win 8.1.
Does anyone have any idea what can be set in either OS X or Fusion that will tell the operating system(s) that this internal "sound card" actually can provide 48 kHz worth of audio and not 15 - 20 as it is now doing? As it stands now, the application is pretty worthless with only that type of audio response.
Thanks, Jim (FCC licensed ham op W6JHB)