thank you all for helping me. i will now address your questions. first, i believe all my computer specs are part of my profile so i will not list them here.
1. sonar platinum i have loaded both 32 and 64 bit
2. the plugins i normally use are the ones that come with sonar, the only softsynth that runs all the time is superior drummer.
3. i just installed a new interface because everything i've been using for the past year or so have been too complicated. all i ever need id 2 in 2 out, so what i have is focusrite 2i2. i have not installed any of the 100+ plugins it came with. i have no use for 20 compressors etc.
4. parameters. i haven't noticed what i'm doing to cause the noise, however, i will start paying more attention next time it happens and pass it along.
5. the soundcard is in #3 and again, i'm running both 32 and 64 bit and it's ASIO. my last interface was the roland quad capture (which is for sale) and the drivers were not behaving so a tech at sweetwater downloaded ASIO4ALL which didn't improve anything. now i'm using the drivers that came with the focusrite.
ok that's all i have so far, i'm going to start working now and see what i see, i will also check out the links that PeterMc posted.
again, thanks so much for all your help and please, if anyone has anymore thoughts or ideas send them on.
jp