Originally Posted by Phi.Lion

Thanks for the suggestions. They have helped some, but for some reason I'm still getting the lagging / crackling noises when I play my more complex tracks.

Being that I'm on a mac, I can't run ASIO4ALL. I can't find any options to increase the buffer in my Mac Core Audio Drivers, so I've increased the buffer size in Reason. But to stop the crackling / lagging noise, the buffer needs to be too high (I say "too high" because with the buffer increased like this, any small changes such as muting / solo'ing tracks are noticeably delayed, and the change occurs not at the timing I had intended).

I don't know if my computer is too outdated, but it's only a year old (MacBook with OSX 10.4, 2.16 GHz Intel Duo, 2 gigs RAM). Since buying a new laptop isn't really feasible right now, I'm trying to troubleshoot this problem any way that I can. Here's a couple of my ideas:

One problem is that my hard drive is waaaay full, like only 3 gigs left out of a couple hundred gig capacity. Does this affect my virtual memory, and then processing power going into / sound coming out of Reason? If this might be the problem, can I just move my files onto an external hard drive to bypass this problem?

The lag / crackle comes at the highest decibel points in my tracks / loops, which are also the points where the most instruments and samples are being used. I've double checked the volume from each device into the virtual mixer and even used the limiter to be sure nothing should be clipping. Is there any way that the Reason sound output might be clipping en route through my sound card and out of the headphones jack? If this is the case, can I bypass this problem by routing the sound through another audio output than my headphones jack, such as an extra audio interface like my old MBoxes, etc?

Any other suggestions would be helpful. I've brought the .rns files onto a friend's computer, and they ran without any problems. I really appreciate the help.

Lance