Live Sound Mistakes We See Most Often and How to Avoid Them

Treating the soundcheck as a formality

The commonest mistake I see is a soundcheck squeezed into whatever time is left after the stage has been built. Bands arrive late, the doors are close, and the engineer is asked to get a rough balance in ten minutes. What follows is a show mixed on the fly, with the audience as the test. A proper soundcheck has an order. Line check first, with every input confirmed against the stage plan, then the monitors, then the house mix. Skipping the line check means a dead channel or a swapped cable is found during the second song, when nobody can fix it quietly. We ask organisers to protect the check in the running order, in writing, before the day. If a schedule slips, shorten the changeover between acts rather than the check itself, because a tired engineer working from a bad starting point cannot recover it later.

It also helps to check with the room as it will be, not as it is during build. A hall with no audience sounds livelier than one that is full, and a tent with its sides open behaves differently from one that is closed. Allow for that when settling the final levels, and expect to make small adjustments once people arrive.

• Confirm every input against the stage plan before any mixing
• Protect soundcheck time in the running order
• Check monitors before the house mix
• Expect small changes once the audience is in

Ignoring the room and the weather

A sound system tuned in one venue and left untouched in the next is a quiet source of poor shows. Walls, ceiling height, glass and floor surface all change how a speaker behaves. A set of settings that worked well in a village hall can make a stone-walled function room harsh and tiring within an hour. System tuning is not an extra. It means measuring the room, setting delays so that fill speakers agree with the main system, and trimming frequencies that the space exaggerates.

Done early, it takes a short while. Done after the doors open, it rarely gets done at all. Outdoors, wind and temperature enter the picture. Sound carries differently on a cold, damp evening than on a warm afternoon, and a gusty site will push the top end away from the back of the crowd. In these weeks of mid autumn, early evening events often cool quickly, so we recheck the system just before the headline act rather than trusting the afternoon's settings.

Weak signal routing and cable habits

Many faults that sound like equipment failure are really routing faults. A channel sent to the wrong output, a stage box patched in a hurry, or a long cable run laid across a walkway all cause problems that are hard to trace once the show is under way. Good routing starts on paper. Every source gets a number, a label and a destination, and the patch is documented so that a second engineer could take over without a long conversation.

We label both ends of a cable, not one, and we keep power and signal cables apart wherever the layout allows, because that is the simplest protection against hum. Spares matter just as much. A few spare leads, a spare microphone, spare batteries and a known good direct box cost very little and turn a show-stopping problem into a thirty-second swap. The mistake is assuming that everything will work because it worked last time.

• Label both ends of every cable
• Keep power and signal runs apart
• Document the patch for a second engineer
• Carry spare leads, batteries and a spare microphone

Monitor mixes left as an afterthought

Performers who cannot hear themselves play badly, and an audience hears it. Yet monitor mixing is often handled last, with a single shared mix and a quick instruction to turn things up. Turning up on stage then spills into the room, makes feedback more likely, and leaves the front-of-house engineer fighting noise that was never part of the plan. A better approach is to ask each performer what they need before the check begins.

A singer may want mostly their own voice and the rhythm section, a drummer may want the bass above everything else. Small, specific mixes are quieter overall and far easier to keep stable. Where the budget allows a separate monitor engineer, the difference is clear to everyone, including the audience. Where it does not, we keep the monitor requests short and agreed in advance, and we resist the temptation to fix every complaint by raising a fader.

Planning sound without the rest of the production

Sound rarely fails alone. A lighting rig hung where the speakers needed to fly, a stage set that blocks the line of the main system, or a broadcast feed that needs a clean mix sent to a van all become problems when audio is planned in isolation. We ask for the stage plan, the lighting plot and any broadcast requirements together, and we look for conflicts before load-in rather than during it. Power is a frequent clash: audio, lighting and catering sharing a supply can introduce noise and tripped breakers at exactly the wrong moment.

Talk to the other crews early. Agree who needs access to the stage and when, where cable routes run, and who has the final say if two needs collide. A short conversation a week before is worth more than a long argument on the day, and it keeps the show running to time.

• Share stage plans and lighting plots with the sound team
• Give audio a separate, clean power supply where possible
• Agree cable routes and stage access in advance

Leaving the handover and the wrap to chance

The last common mistake sits at the end of the night. Equipment is packed in a hurry, settings are lost, and nobody records what went wrong. The next event then repeats the same faults. We save the console state after the show and note anything that behaved badly, from a suspect channel to a speaker that needed repositioning.

A brief written summary goes to the organiser, so that a venue with a known problem can address it before the next booking. Packing deserves care too. Coiling cables properly, checking that nothing is left on stage and counting kit against the list prevents the small losses that add up over a season. A calm wrap is part of the job, not an afterthought, and it makes the next load-in faster.

None of these mistakes needs expensive equipment to fix. They come down to giving sound the time, information and respect it needs before the doors open: a protected soundcheck, a tuned system, clear routing, sensible monitors and a plan shared with the other crews. If you are preparing an event and want a second pair of eyes on the audio plan, get in touch through the contact page.