Hi
I have just built myself a new system comprising of:
Windows 8 Pro -64-bit
Intel i7 CPU
Intel Motherboard
Intel SSD HDD
Seagate Hybrid HDD
32Gb RAM
 
I have a V-Studio 100 for audio in and out and it has worked seamlessly on older hardware using X1 and previous versions. It has the latest firmware.
My new machine runs X2 Producer and given the power of the hardware, I decided to change the sample rate and bit depth from 48KHx 16-bit to 96KHz 24-bit.
The system seems to run perfectly until I try to insert certain plugin instruments such as Cakewalk TTS-1 or Roland Groove Synth. 
The sound produced from these instruments seems like there is an issue with the clock in that they are very distorted with an almost flanging effect.
Dropping the sample rate back down to 48KHz corrects the problem.
 
Also, Pentagon 1 will not insert into a track and it reports that 'it might not be installed correctly'.
 
Has anybody else had these issues and discovered a fix?
Do they just not work at 96KHz?
 
Thanks for any suggestions.
Gordon

For TTS-1 to work at 96KHz, click the system button on the TTS-1 UI, on the System dialog click the option button, enable "Light Load Mode" on the Options tab.
 
IIRC, GrooveSynth at 96KHz is unreliable.
 
Are you running SONAR as administrator? It is a requirement for Pentagon I.
 
If you want to use the older synths like TTS-1 and GrooveSynth staying at 48KHz 24bit might be the best solution.

Thanks Scook
I can confirm that TTS-1 does indeed work OK in Light mode!
Also Pentagon seems to run fine as an admin.
 
Result!
Thanks again.
 

As mentioned above, bith depth is in many ways more important than sample rate, it gives you better dynamics.
96 kHz is understandable, if you're dealing with pro studios using that, otherwise it's a waste of resources, IMO, not to mention, as you've noticed, that it can cause problems with some VSTs.
Especially, if you're working with audio, you need to have xxxx dollar microphones and top notch room in order to utilize what 96 kHz has to offer.