I tried recording one of my band's practices using my new(er) Latitude C600 laptop, and a few different softwares. Audacity ROCKS! But, the recording sure didn't.
I'm sitting there going nuts, plugging stuff in and unplugging it, between our 16 channel Yorkville sound board and my laptop. No matter what I do, I've got this overpowering noise coming through, unless I unplug the audio connection. Tried the RCA recording outs, line level left and right outs, the headphone jack on the board, everything. Also tried every possible combination in the recording settings of Windows, the mixer, Audacity.
Finally, I'm thinking "well, it's a laptop. maybe it's not going to work" because I pulled this same stunt with my Blue and White, and got perfect results. Being the troubleshooter that I am though, I just happen to try pulling the AC connection on my laptop... BAM! Noise gone. Crystal clear.
Too bad I only get very close to an hour on battery!
So, I'm thinking I am getting some noise from, the board and the laptop being on the same circuit? Tried plugging in as far away as I could get from the board, on a different room's AC... no dice.
Plugging an MP3/DVD player the same way, no trouble and perfect results.
What can I get to throw a) on the AC power of my laptop b) between the board and my laptop ... that will filter out this noise? WTF is it, anyway?
Laptop and board are both grounded three-prong style as far as the wall jack; don't know after that. But I did try this at a gig with the same overpowering noise, so I don't think it's specific to the house's wiring either.