What is the difference between a post-fader and a pre-fader auxiliary send and in what situations would I use either one?
A post fader Aux Send taps the incoming signal from the channel at a point after the channel fader. This means that when the channel fader is down, no signal is sent out the Aux Send(s) on that channel. Post-fader Aux Sends are generally used as “effects sends,” to send signal out from a particular channel to an effects processor. Since the channel fader controls the level of signal being sent to the main mix as well as the level of signal being sent out the Aux Send, when the channel fades down, the level of the “wet” signal follows the level of the “dry” signal. If the level of the wet signal did not follow the level of the dry signal, the effect would still be heard after the channel fades out. A pre-fader Aux Send taps the incoming signal from the channel at a point which is before the channel fader. So, when the channel fader is down signal is still being sent out the aux send(s) Pre fader aux sends are helpful for live sound reinforcement situations where the front-of-house conso