🎤 Live Audio Signal Chain

Trace a voice from the microphone all the way to the speaker. Click every stage to learn what it does, set your gain without clipping, and prove you can tell an XLR from a TRS from a TS by sight.

Pick a stage Click any block above to see what it does to your signal — and what goes wrong when it's set up badly.

🎚 Gain Staging Lab

Singer's voice (source)Medium

Gain / Trim (preamp)+20 dB

Channel fader0 dB

Master fader0 dB

Turn up the gain too far and listen to what clipping actually sounds like.

📊 Meters — watch every stage

CLIP

Preamp

-∞

CLIP

Channel

-∞

CLIP

Master

-∞

Adjust the controls to bring all three meters into a healthy range.

🔌 Cable ID Challenge

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Know Your Connectors

XLR — 3 pins, balanced

The standard microphone cable. Three pins carry the signal twice — once flipped upside-down — so any noise picked up along the way cancels itself out. Locks in place so it can't be yanked out mid-show.

TRS — Tip · Ring · Sleeve

A ¼″ jack with two dark rings. Balanced like XLR, so it can run long distances cleanly. You'll find it on headphone outputs, monitor sends, and balanced line connections.

TS — Tip · Sleeve

A ¼″ jack with one dark ring. Unbalanced — fine for a short guitar cable, but it picks up hum and buzz over long runs. Never use a long TS cable where a balanced cable would fit.

Live Sound Essentials

⛓ The Chain Is Only as Strong…

Every live sound system is the same story: capture → carry → control → amplify → deliver. A $5,000 console cannot fix a badly placed $100 microphone, and a perfect mix dies in a bad speaker. Fix problems at the earliest stage they appear.

🎚 Gain Staging & Unity

Set the gain (trim) so the loudest moment of the source sits just below clipping at the preamp — that's your headroom. Then leave the fader near unity (0 dB), where the console neither boosts nor cuts. Mixing happens with faders; gain is set once and left alone.

Golden rule: if the preamp clips, no fader below it can undo the damage. Distortion recorded at the first stage travels through every stage after it.

📣 Why Clipping Sounds Awful

An audio signal is a smooth wave. When a stage runs out of voltage to describe the wave's peaks, it flattens them — literally slicing the tops off. Those squared-off edges add harsh new frequencies that were never in the singer's voice. Once clipped, the wave can't be un-flattened.

🔁 Feedback in 10 Seconds

Feedback is a loop: the mic hears the speaker, the speaker replays the mic, and one frequency snowballs into a howl. Break the loop by moving the mic behind the speakers, pointing it away from them, or cutting the ringing frequency on the EQ. Turning everything down is the last resort, not the first.

🎭 In Our Productions

This is the same chain you run for Newsies and Wonka Jr.: a wireless lav is the mic, its receiver feeds the console preamp, the channel fader rides the vocal, and the master feeds the mains. When something goes silent mid-show, walk the chain from the mic forward — the break is almost always at a connection.