Are you using your Mac's cheapo internal audio hardware?
Logic is a professional application and is designed to use professional level hardware, it will run on the standard Mac audio but your sound and usability might be somewhat limited, however, it should work for what you're asking. Do you have a full set of surround audio hardware being used, speakers....etc?
Since you're fairly new to Logic I presume you've checked out the manual, specifically:
"Configuring You Audio Hardware" That chapter can be found at the link below... (Read This Chapter)
Set "Line-In" for the Input
Set Built-In Audio for the Output
Set the I/O Buffer to 256, if you hear a slight delay go down to 128.
Do NOT record at a high sample rate because you can, it's of no use to you right now.
Set the Sample Rate to 44.1 and the Bit-depth level to 16-bit. Use Audio-MIDI Setup to do this, used to be located in the Utilities Folder.
If you are running Airport or Wireless, try disabling
If you do not have a surround setup, don't use surround sound.
Thank you for the suggestions.
I had previously tried all of the above but the airport/wireless thought. Unfortuneately, none of these things made a difference, including the wireless suggestion.
Currently, I am using my Mac's "cheapo" internal audio hardware (haha). I have a one year old 27-inch iMac, a good pair of bose speakers, and a polk sub. I don't believe it is an issue with my setup, considering I completely disconnected and unplugged it.
I did, however, do a little info hunting on the internal audio situation, since I was curious what is actually included, and I stumbled upon this interesting little tidbit about my model of iMac:
I had previously wondered if I was hearing my mouse in my speakers as well (not just in logic). It appears that this model of iMac may have some grounding issues, as someone later in the thread suggested purchasing and using a ground loop isolator, which seemed to fix any extra interference for them.
Ironically though, I have since opened logic, and do not seem to be encountering my previous static issue(yet).
Fingers crossed, hoping that I will not be experiencing it again. Going to purchase a ground loop isolator, and continue to mess around with logic, just to make sure it was not just an internal audio issue with my iMac.
I guess it could be a physical grounding problem, do you have any other peripherals connected to the Mac?
You can always test out a ground problem using a "ground lift adapter" (inexpensive 3 to 2 prong wall adapter).
Try an adapter on your speakers, if no change try it on the Mac, or any other device that's plugged into wall current and connected your Mac.
The reason I said cheapo internal audio is both PC and Mac audio chips are purchased in bulk, mounted in the middle of noisy motherboards, have uneven frequency response and generally inferior sound.
Having used Logic from long before Apple's purchase of the company that designed and programmed it, I never thought I'd see the day that Logic would be used with anything but exceptional hardware but that's all beside the point. Apple sells it and it should work with your setup.