I always use input/output 1 or 1 and 2. It's rather trivial since the plugin is then disabled anyway, thereby routing nowhere. It just doesn't work if you don't do this. I don't get crackle (to my knowledge) on the instrument tracks. It's only when it's paired with UAD plugs on the Master, Buss, or Aux that I need to insert the I/O plug on all the UAD tracks. I haven't tested the Pultec on an instrument track by itself though. Universal Audio says they're working with Emagic on making this process more automatic. -Jer > I too have been having problems with the UAD card and have > tried the work around using the IO plug in but it does not always > work. Here is my question for you. When you assign the IO plug > in to the audio or audio instrument track on which you wish to > use a UAD plug in when you designate the input and output on > the deactivated plugin what settings are you using. For example, > say I want to use a pultec eq on audio instrument 1 (and I have > put an exs24 instrument on audio track one with a kick drum in > mono)> So I put a Logic IO helper in the top plug in slot, > however, out of the available choices I do not know which input > number to select. I usually select output 9 because 9 > corresponds with my main analog out in my asio configuration. > If you could point out what I am doing wrong it would be greatly > appreciated. I am using the following gear: