A Mixer Setup Checklist to Run Through Before You Commit

Most trouble with a field mixer does not come from the mixer. It comes from a decision made too early: a channel count picked before anyone counted the speakers, a routing habit carried over from the last shoot, or headphones chosen because they were already in the bag. A short checklist, read through before you commit to a setup, catches those problems while they are still cheap to fix.

In these mid-autumn weeks many crews are planning winter interviews and indoor panels, which means smaller rooms, more hum and less time to settle in. I teach this checklist in the mixer setup and monitoring module because it forces the same questions in the same order every time.

None of the items below needs special gear. They need a few minutes with the venue details and a clear idea of what the recording is for.

Start with a plain count. How many microphones will be live at the same time, and how many of those are speakers who may talk at once? Then count the destinations: the camera, a recorder, a stream, perhaps a return feed for a remote guest. A mixer that fits the sources but runs out of outputs forces improvised splitters later, and those are where hum and dropouts begin.

Write the count on paper, even for a simple two-person interview. It sounds trivial, but it is the number that decides which inputs you assign, how you route the mix and whether you need a spare channel for room tone or a backup feed.

Leave one input free if you can. A free channel is the cheapest insurance in the kit.

• Live microphones at the same time
• Cameras, recorders and stream feeds that need a signal
• Any return feed going back to a remote speaker
• One spare input held in reserve

Gain is where safe and consistent levels are won or lost. The order matters more than the exact numbers. Set each input with the speaker talking at the volume they will actually use, not a polite test voice, and raise the gain until the loudest normal peaks sit comfortably below clipping on the meter. Then leave a margin for the moment someone laughs or leans in.

Set the channel gain first, then the fader, then the output level to the camera or recorder. Changing them in a different order each time is how a mix ends up too quiet at the source and too hot at the destination.

Check every input one at a time before you bring them together. A single noisy channel is much easier to hear on its own than inside a full mix.

• Ask each speaker to talk at their real volume
• Keep headroom for laughter and sudden peaks
• Gain first, fader second, output last

Routing is the part people leave to the last minute, and it is the part that hurts when a recording fails. Decide which inputs go to which outputs, and whether the camera receives a mixed feed or separate channels. A mixed feed is simpler to monitor, while separate channels give you room to fix a balance afterwards.

Think about the recording format you will deliver. If the editor expects a single stereo track, a clean mix is enough. If they expect isolated speakers, route each microphone to its own track and confirm the recorder is set to match.

Label the cables and note the routing on a card taped to the mixer. When a second operator steps in, the card saves a conversation you may not have time for.

Monitoring is how you hear problems before the recording does. Closed-back headphones that isolate you from the room let you judge speech clearly, and they should be comfortable enough to wear through a long panel. Set the monitoring level so you are not tempted to turn it up to hear a quiet speaker, because that hides noise you would otherwise catch.

Listen for what the meters cannot tell you: a faint buzz, a rustle from a lavalier brushing a jacket, a chair that creaks every time someone shifts. Take a minute in silence before the speakers arrive and listen to the room itself.

If someone else needs to hear the mix, such as a producer, plan a second headphone path rather than passing yours back and forth.

• Closed-back headphones for isolation
• A quiet minute with the room before the session
• A second headphone path for the producer

Finish with a short rehearsal of the whole chain. Record thirty seconds with every microphone live, play it back through the same headphones, and confirm that each track holds what you expect. This is the moment to find a wrong route or a muted channel, not after the first answer of the interview.

Then ask whether the setup survives a change: a speaker who arrives late, a microphone that fails, a request to add a guest. If any of those would force you to rebuild the mix from scratch, adjust the plan now.

If the answers are clear, you can decide with confidence. If they are not, that is a good sign you need to talk the venue through with someone before the day.