Start by listening, not buying
Most of the audio problems I am asked about turn out to be decisions made in the wrong order. A studio buys a new microphone because the speech sounds thin, and the thinness is still there a week later, because it came from the room, the distance or the way the signal was monitored. Before you spend anything, listen to a recent recording on good headphones and write down, in plain words, what bothers you. Muddy, harsh, distant, uneven and noisy are five different problems with five different causes.
This is the first item on the list because it costs nothing and it narrows everything that follows. Play the recording to someone who was not in the room and ask them what they notice first. If they mention the sound before the picture, you have a workflow question rather than an equipment question, and that is the point at which a review becomes worth the time.
- Record a short sample of a normal live segment
- Listen on headphones and on small speakers
- Name each fault in one word before looking for a cause
Check where the microphones actually sit
Placement does more for clarity than any piece of kit. Look at how far each presenter's mouth is from their microphone, and whether that distance changes when they turn to the guest or look down at notes. A lavalier clipped too low, or a boom that sits a hand's width too far away, will make a good voice sound distant, and no amount of mixing quite rescues it.
Walk the set as a presenter would, from the first mark to the last, and speak at your normal volume while someone listens at the desk. Note where the level drops, where the room starts to creep into the voice, and where clothing or a desk surface adds noise. Mark the good positions on the floor or the desk so the next crew can find them without guessing.
- Measure mouth-to-microphone distance for each seat
- Test every position the presenter will move through
- Mark boom and lavalier positions that worked
Ask what happens to the room
A studio can have excellent microphones and still sound poor if the room is working against it. Hard walls, a glass desk, a bare floor and a noisy ventilation unit all end up in the signal. Clap once and listen to how long the sound lingers, then switch the air handling on and off and hear what it adds. These are quick tests and they tell you whether the fix is in the mixing or in the space.
Often a modest change helps more than expected: a rug under the desk, a soft panel behind the camera position, or moving a talking spot away from a reflective corner. I would always try these before replacing a microphone, because they improve every voice in the room rather than one input on the desk.
- Clap test for reflections
- Run the room with ventilation on and off
- Look for hard surfaces close to the speaker
Review the mix and the signal path
Follow one voice from the microphone to the output and write down every stage it passes through. Preamp gain, any processing, the fader, the group, the feed to the broadcast and the feed back to the presenters should each have a purpose. If nobody on the crew can explain why a stage is there, it is a candidate for simplifying, since every unneeded step is another place for a level to drift or a switch to be left in the wrong position.
Check headroom as well. Peaks that touch the limit during an excited answer cause distortion that cannot be undone later. Set levels on the loudest realistic moment, not on a calm rehearsal line, and leave yourself room. A consistent target level for speech, agreed by everyone who sits at the desk, matters more than a clever setting nobody else understands.
- Draw the path from microphone to output
- Set gain on the loudest likely moment
- Agree one speech level target for all operators
Make sure the monitoring can be trusted
You can only fix what you can hear accurately. Ask whether the person mixing is listening on headphones or speakers that they know well, at a steady volume, and whether the studio floor and the gallery hear the same thing. Many live shows go wrong because the mixer hears a pleasant sound and the audience receives something different, and nobody has a way of comparing the two.
Include talkback in this check. Presenters need to hear the programme feed and cues clearly, and a producer who has to shout over a noisy return will lose the thread of the show. Test every return before the crew arrives, and keep a spare pair of headphones and a spare cable within reach of the desk, since monitoring is the first thing to fail under pressure.
- Use the same headphones for every show
- Compare studio and gallery listening
- Test talkback and returns before the crew arrives
Decide who owns the sound on air
The last item is about people, not equipment. On a live show, someone must be responsible for the sound, with the authority to say that a microphone is wrong or a segment cannot start. If the answer to who is in charge of audio is everyone, then in practice nobody is, and faults are discovered by viewers first.
Write a short running checklist for the sound operator covering the pre-show check, the sequence for opening and closing microphones, and what to do when a lavalier fails. Keep it on the desk, and review it after each broadcast. When a team can describe its audio routine in a page, it is usually ready to improve it, and that is a sensible moment to ask for an outside review.
- Name one person responsible for audio per show
- Keep a written pre-show and fault routine
- Review the list after each broadcast
None of these questions needs special equipment, and most can be answered in an afternoon with the people who already run your studio. If you reach the end of the list and find several gaps in placement, monitoring or ownership, you have a clear starting point for deciding what to change first, and a useful brief for anyone you ask to help.
