MBAs do have a fan. I thought for a long time my Air didn't and then one day I overloaded FireFox. More open tabs than one person aught to have.Rode NT-USB and MacBook Air
The machine started to get warm and the tiny fan went on. .....eeeeeEEEEEEE.
I would not be good for that to happen in the middle of a paid reading, so it's recommended to close all other applications and disconnect the network and/or shut down the WiFi when you read.
If you've been reading the forum posts, you know stuttering, crackling and popping readings are common with live readings. Unless proven wrong, those errors are caused by the computer doing something else while it's recording the work.
Live readings don't wait. There's no such thing as "Hold on a minute while I process this spreadsheet or update Skype." Each word follows the next and the computer has to be there for all of them.
Clean slate is good.