In need of help - sound issues

im hoping youll get a few more posts from some more educated people here on this issue.but my first guess would be your buffers.
try this go int o audio/preferences under playback/record you should see a  buffer.try increasing this you may have to play with it to get it right as this will also effect latency.it may also be the wave profile set you up with in a matter where your not using the right soundcard if its set to mmc and you have a better soundcard it may not recognize it.play with your settings..but right them down so you can keep track as to where they were.i not an expert in this area..i know beagle is the guy who you want to talk to.look for his profile and send him a message..hes a great guy that has been helping people for decades..lol...serious..hes the man.
good luck

Thanks for the replies.

I'm fairly sure it's a soundcard issue but then again, it might not be. I have my Lexicon audio interace going into the pc & my midi keyboard going in there too.

Am I doing something wrong? I can get sound when my speakers are selected but as soon as I click on Asio, it can crash the program or when I click 'usb device' as an output...nothing happens. Although you can clearly see my playing the notes as the levels are going up.

Urgh, it's most likely a really simple problem too! Yet, there's no way I can put up with that horrible sound anymore. Every bass has such a tinny sound. Not good.

Don't think the woofers are blown. I only got it recently (not that it helps) & it works brilliant with music outside of Sonar.

I've tried using EQ to sort it out but no luck. Again, I'm fairly sure it's not using the Lexicon properly.

As I said, I click on ASIO & nothing happens. It chose MME as the default.

Also, what are you using to make those bass sounds? The keyboard's audio? A software synthesizer?
Check the volumne level of each offending track to see if any are redlining. Check their buses and the Lexicon's output level.

the lexicon might not have asio drivers, I thought that it did. 

did you install drivers for the lexicon or did you just let windows install what it wanted to?  if you didn't install drivers for the lexicon and if you didn't update the drivers from the lexicon website, then do that.  THEN try ASIO.

if you did that, then report back.

what seems to have helped?  installing the latest drivers from lexicon?

if that's what you mean, and you're having popping and dropout, then I also need to know if you stayed with WDM driver mode or ASIO.

did you download the drivers from lexicons website?

well.  I"m not sure what advice I can give you that will work if you won't use the advice I gave you already.

when you decide to try downloading the latest software drivers from lexicon let me know if it doesn't work after that.

Well, I downloaded.

I also made sure my default speakers wern't being used by Sonar.

Still seems to get some serious loud 'clipping' issues. Thing is, it's totally random. It was fine earlier but now it's doing it all the time. How does that work?

I noticed that everything in my audio options are now ASIO. Sounds great otherwise.

I noticed you can't change the latency slider bar? Sorry for my naivety again.

Ok, so I found the latency slider. Tried it in all posistions.

Seems it doesn't like the highest either. I ended up putting just below the highest setting. Seems to work pretty well now. Every now and again I'll get a little clip sound but it's nothing compared to what it used to be.

Guess I'll go with it for now.

I do have another question to do with Sonar HS 7XL. Can I ask it here or is it worth starting a new thread? Thanks for all the help anyway.