Preparing Your Sound for the Darker Months: An Audio Engineer's Autumn Notes

Mid autumn is when audio problems start to arrive that nobody planned for. Studios that were warm and dry in summer begin to feel the heating cycle, with fans and radiators adding a low rumble that a microphone hears long before a producer does. Location work moves indoors or under cover, and echoing halls replace open air. The sound you captured easily in August needs a different approach now.

I write this as the person who keeps the technical notes for our crews, so the advice here comes from the checklists we revise each year at this point. Priya Nair leads our audio work, and much of what follows reflects how she asks crews to think about the next few months rather than about any single job.

The useful habit is to treat the change of season as a scheduled review. Set aside a short session before the busy weeks, listen critically to your rooms and your kit, and write down what you find. Small corrections made now cost an hour. The same faults found during a live programme cost far more, and sometimes cost the take.

Microphones and cables dislike sudden changes in temperature. Bringing a cold condenser capsule into a warm room can leave condensation on the diaphragm, which shows up as crackle or a thin, hissing top end. Allow equipment to settle to room temperature while it is still in its case, and avoid opening it straight away. This costs nothing but a little patience and protects expensive parts.

Cables deserve the same attention. Connectors that have sat in a cold van collect moisture, and intermittent contacts often appear first as faint crackles during quiet speech. Run every cable through a simple continuity and flex test before it goes on a shoot, not on the day it fails. Replace anything that crackles when moved, however much you like it.

Wireless packs need fresh batteries and a check of their frequency settings. Cold drains cells faster than you expect, so carry more spares than a summer job would need, and keep them in an inside pocket rather than the kit bag.

• Let cold microphones warm up in their cases before use
• Flex-test every cable and retire any that crackle
• Carry extra batteries and keep them warm
• Label frequencies on every wireless pack before leaving

Before placing a single microphone, stand in the space and talk, clap once and listen to how the room answers. Hard surfaces, large windows and bare floors lengthen the tail of every word. In autumn these rooms are often full of heating noise as well, so switch systems off briefly during recording if the venue allows, and agree this with the organisers in advance.

We find that a few minutes of careful listening saves hours of repair in the mix. If a room is lively, move microphones closer to speakers rather than raising gain, because gain lifts the room along with the voice. Soft furnishings, drapes and even a row of coats can tame a surprising amount of reflection.

Record a short test of room tone before the guests arrive. Thirty seconds of the empty space gives an editor something to match when a clean cut is needed, and it documents what the room sounded like when you started.

Headphones are the engineer's eyes, and they matter more when the schedule is crowded. Closed-back pairs that block out the gallery are worth the weight. Agree a reference level at the start and keep to it, so that your judgement of a mix does not drift as your ears tire over a long afternoon.

Early dark brings longer days in the studio under artificial light, and fatigue builds. Rotate monitoring duty where the crew allows, and build short breaks into the running order. A tired ear forgives hum and distortion that a fresh one would catch at once.

Keep a second, independent route to the programme sound where the budget permits, even if it is only a recorder taking a feed. If the main chain fails during a live segment, that backup is what lets you tell the producer the audio is safe rather than lost.

• Use closed-back headphones and fix a reference level
• Rotate monitoring duty on long days
• Keep an independent backup recording of the programme feed

Shorter daylight hours push more recording into evenings, and evening crews arrive from other work. Brief everyone on the signal flow at the start, even if they have worked with us before. A clear sheet showing who is on which channel, which microphone feeds which fader and where the talkback sits removes a great deal of quiet confusion.

Rehearse the awkward moments rather than the easy ones. Test the handover between presenters, the arrival of a guest with a poorly fitted microphone, and the moment the music bed ducks under speech. These are the points where seasoned crews still stumble, and a short run-through usually reveals the weak joint.

Finish each session by noting what went wrong and what you would change. These short notes are the most valuable documents we keep, and they build into a reliable guide for the next dark month.

Pull the season together into a simple routine that any producer can ask of a crew. It does not need specialist language, only the discipline to do it before the busy weeks arrive rather than during them. Check the kit, listen to the room, agree the monitoring and rehearse the difficult moments.

If you are commissioning audio work over these weeks, ask your engineer how they handle damp equipment, what backup they run and how they treat room noise. A good answer is specific and calm. A vague one suggests the preparation has not been done.

None of this requires new equipment, only a little planning and a willingness to listen carefully. Good sound over the winter is largely the result of habits formed in autumn.

• Test kit and cables ahead of the busy period
• Record room tone before guests arrive
• Brief the whole crew on signal flow
• Rehearse handovers and awkward moments
• Write down faults while they are fresh