Faster Audio in Premiere
You get footage from a shoot, let’s say it’s a documentary project. The main camera has a left channel and a right channel of audio, and on set the filmmaker plugged the boom mic into the left channel and a wireless lavalier into the right channel.
Which is a fine way of working. But then footage comes into Premiere without proper planning for the audio setup. The editor begins his/her dailies and selects, even gets into cutting some of the projects together.
Source: A Faster, More Efficient Way to Work with Audio in Premiere