Hi Looking for a bit of help from one of the fine people on this forum. I record a podcast and have recently started having weird crackling sounds that I cannot figure out. We use: Carol microphones -> Wharfedale EZ-m 20x2FX mixer -> ESI U24XL -> Macbook Pro. We use Audacity to record, and Soundtrack Pro to edit. An example of the sound can be heard on our podcast here, worst around the 32 minute mark. http://www.bangkokpodcast.com/thai-language/bangkok-podcast-thai-language-series-2/ This crackling is AFTER running it through Soundtrack's click remover four times. The crackling seems to be louder the louder we talk, leading me to wonder if it's a problem with the electric current? The cables are all secured and jiggling them doesn't affect the sound in any way. Any help would be much appreciated, thanks.