I have recently upgraded to a new computer and noticed several of my reinstalled 32 bit synths now make a strange drone and "whopping" sound when played.  The big ones are an old NI B4, AAS Tassman 4.1 and Camel Chameleon.  There are others too.  This did not happen with my old computer (I did the free upgrade to Win 10 on that, this one had Win10 pre-installed.)  In both cases (old and new computer) I am using the latest version of Sonar Platinum.  One thing that did change was that I went from an old firewire card for sound to a Focusrite, Scarlett 2i4 USB interface.  The manufacturer of Superwave recommended trying a 32 bit wrapper which fixed the problem on Superwave and one or two others, but not all of them.   It isn't like I can't afford to just not use these 3 synths, but I have always really loved that old B4.  Not particularly keen on installing a 32 bit version of Sonar just for these few synths.  Any ideas or thoughts?  Thanks in advance.

Did you use Jbridge as the wrapper - I use this for any 32 bit plug in I still use

The fix for Tassman is get the 64bit version. It is a free update and has been available for years. Consider picking up GSi VB3 to replace the old B4. I have not used Camel Chameleon so cannot suggest a solution for it.
 
In general 32bit plug-ins run better in 32bit hosts. Install 32bit SONAR and use it when running 32bit plug-ins. the 32bit and 64bit versions may be installed on the same machine.

Unfortunately for Cameleon, its successor (Alchemy) is lo longer available for PC thanks to Apple having bought out Camel Audio.
 
There are a fair amount of additive/spectral synthesizers out there, but I haven't tried any of them lately.  iZotope Iris, Image Line's Harmor, DiscoDSP's Vertigo, and the one by VirSyn come to mind.  You might also want to check out NI's Razor, although it's a different perspective.

Thanks for the suggests.  Looking for 64 bit Tassman now. Will also check into other synths.  Yes, JBridge was the suggested wrapper and I purchased it.  Works on several of the 32 bit plug ins but not the ones I mentioned.

Well duh.... didn't point Sonar to the right folder for the Tassman 64 bit  The organ replacement for B4 seems interesting and will check it out when I get back home.  I will definitely look into some additive synths but I don't really need them.... I already have far too many for my level of talent (although I do love to mess around with them!)