The switcher operator is one of the most invisible roles on a live production — until something goes wrong. When it’s going right, nobody thinks about it. When it’s going wrong, everyone notices immediately. If you want to sit behind a switcher on a real gig, here’s what you actually need to understand. What a Switcher Does A video switcher (also called a vision mixer) is the hub that all your video sources feed into. Cameras, laptops, playback machines, confidence monitors, graphics systems — they all land in the switcher, and the switcher decides what goes to the screen. At its most basic, it’s a selector. At a professional level, it’s a production tool with transitions, layering, keying, and multi-output routing built in. The operator’s job is to make decisions in real time, cleanly and on time, every time. The Bus System Most switchers are built around a bus architecture. The two you need to know first: Program bus — this is what’s live. Whatever is selected on program is on the screen right now. Preview bus (sometimes called preset) — this is what’s queued up next. You select your next source on preview before you cut or transition to it. This two-bus system is fundamental. You never reach blindly for your next source. You pre-select, confirm visually on your preview monitor, then take it. That rhythm — select, confirm, take — becomes muscle memory with practice. Cuts vs. Transitions A cut is an instant switch from one source to another. No ramp, no fade — just a clean edit. Cuts are the workhorse of live production. They’re direct, they’re fast, and when timed right they’re invisible to the audience. A transition moves between sources over a defined duration. The most common is a dissolve (also called a mix or crossfade) — one source fades out as another fades in. There are also wipes, pushes, and DVE moves, but in corporate and event production, you’ll mostly live in cuts and dissolves. The rule most experienced operators follow: cut on movement or speech, dissolve on stillness or mood shifts. It’s not a law, but it’s a good default while you’re building instincts.

Most new techs don’t know what gobos are, let alone how to use them. Once you understand what gobos do — and how to use them well — they become a valuable resource for creating a fantastic room look. What Is a Gobo, Actually? A gobo is a thin metal or glass disc that slots inside an ellipsoidal fixture (also called a Leko or profile spot). It sits between the lamp and the lens, and light passes through the cutout pattern in the disc to project that shape onto a surface. Metal gobos are punched or etched — geometric patterns, foliage, abstract textures, window frames. Glass gobos are photographically produced and can carry full colour and fine detail. They’re more fragile and more expensive, but the image quality is in a different league. The basic concept is simple. The craft is in the execution. How the Optics Work Ellipsoidals have a focus barrel — a sliding lens system you adjust to sharpen or soften the projected image. Push it toward a hard focus and the gobo pattern comes in crisp and defined. Pull it the other way and the edges bloom and soften. Neither is wrong — they’re creative choices. A sharp window pattern on a cyc looks architectural. A soft leaf texture washing over a stage looks organic. Two other things affect how big the projection ends up: throw distance (how far the fixture is from the surface) and the fixture’s lens focal length. Longer throw means a bigger image. If you need a gobo to land at a specific size in a specific spot, look up your fixture’s beam angle specs and do the math before load-in. Surprises at focus time cost everyone. Static vs. Rotating Gobos On a conventional ellipsoidal, the gobo sits still. Drop it in, focus it, done. Moving head fixtures are different. Many have two gobo wheels — one static, one where each gobo can spin independently. Slow rotation gives you a hypnotic ambient look. Fast rotation breaks up into something almost stroboscopic. Some fixtures let you lock the gobo at a precise angle, which matters when you’re trying to line up a pattern across multiple fixtures.

Solved this issue the other day on a job site and thought it would make a good post! Dip Switches are a series of tiny binary switches numbered 1-9 that can be switched ‘on’ or ‘off’. They have different functions on different devices. Sometimes they indicate the radio frequency the device uses to operate - for example, perfect cues. In the case of Dimmers, they determine the starting address of the dimmer. - For example, if you have 1 ON and the rest OFF, on a 4 channel dimmer, channel 1 will be address 1, channel 2 will be address 2, channel 3 - address 3, and channel 4 - address 4. - If you have a additional dimmers, you could set the dip switches such that the dimmer channels will be addresses 5-8, 9-12, etc. Similarly, for analog lighting controllers, dip switches determine the starting address of the faders. - For example, if you have 1 ON and the rest OFF, fader 1 will control channel 1 of the fixture assigned to address 1. Hope that clears up some confusion and helps troubleshoot “issues” that you may encounter in your lighting setups. Often the “fix” is as simple as flicking a switch to the correct setting for your desired outcome!

Power cable gauge (gage) refers to the thickness of the wire conductor, which determines how much electrical current it can safely carry. In North America, this is usually measured using American Wire Gauge (AWG). 1️⃣ How the Gauge System Works 📖 The AWG system is a little counterintuitive: - Lower number = thicker wire = more current capacity - Higher number = thinner wire = less current capacity *Actual ratings depend on insulation type, temperature, and installation method. 2️⃣ Why Thicker Wire Can Carry More Power 💪🏼 Electric current flowing through a wire encounters resistance (a property explained by Ohm's Law). Thin wires have higher resistance, which causes: - More heat - Voltage drop - Energy loss Thicker wires have lower resistance, so they: - Stay cooler - Deliver power more efficiently - Handle higher current safely 3️⃣ What Happens If a Wire Is Too Small ⚠️ Using an undersized cable for the power draw can cause: 1. Overheating = The wire turns electrical energy into heat. 2. Insulation damage = The plastic jacket can melt. 3. Fire risk = Electrical fires often start in overheated wiring. 4. Voltage drop = Devices may run poorly or shut off. 4️⃣ Real Example 🌎 Imagine running a 1500-watt space heater on a 120-volt circuit. Current draw: [I = P / V = 1500W / 120V = approx 12.5A] A 16-gauge extension cord may only be rated for ~10 amps. Result: - Wire overheats - Insulation softens - Potential fire hazard A 14-gauge or 12-gauge cord would be safer. 5️⃣ Why Distance Also Matters 🏔️ Longer cables increase resistance. So even if the amp rating is okay, a long cable may still cause: - voltage drop - overheating That’s why long extension cords should be thicker (lower AWG). 6️⃣ Quick Rule of Thumb 👍 For typical 120V household loads: Current Minimum Safe Wire: - 10A = 16 AWG - 15A =14 AWG - 20A = 12 AWG - 30A = 10 AWG 💡 Simple way to think about it: - Electricity flowing in a wire is like water in a pipe. - Thin pipe → harder flow → pressure & heat build up. - Thick pipe → easier flow → less heat.

If you’ve ever worked with wireless microphone kits before, you may already know where I’m going with this. This myth is so prevalent that I’ve met more technicians who believe it than those who don’t. But if you actually research what the correct approach to gain staging digital wireless kits is, you’ll realize this belief is just plain wrong. Here’s the myth: “You should always set wireless gain to 0dB”. I’m not sure how this myth started. Maybe it’s because 0dB is a good target SNR for your input and output fader levels (ie unity gain). Maybe it’s because people think the preamp of the receiver isn’t as good as their mixer preamps. Maybe it’s because analog wireless relied on companders that degraded audio quality especially over greater distances. Regardless, here are some facts for you: - Proper gain staging starts with the transmitter. - Most digital wireless kits manage transmitter gain via the gain increase/decrease buttons on the front of the receiver. This is what your receiver’s audio meter is indicating. - There is no magic, one size fits all dB value. - The goal is to acquire a healthy audio signal level from your transmitter BEFORE it gets RF Modulated or digitized and sent to your mixer. - Otherwise, you’re compensating with your mixer preamp, resulting in a noisy signal and RF Hiss. - In digital wireless systems, the transmitter gain dictates the dynamic range of your analog to digital converter. So if set too low, you lose dynamic range. - If you’re barely seeing signal in the receiver’s audio meter, your transmitter gain is too low. - Your wireless receiver channels should be set to line level to reduce noise as well. - Your mic offset should initially be set to 0dB. You can utilize this feature later if you need to and can adjust overall transmitter gain on the receiver to keep signal healthy for both mic types. This is just good general practice - only use mic offset if you need it. - If you do this, your mixer should still see a signal that requires amplification. - You can then use your mixer’s channel preamps to bring each transmitter up to an appropriate level with faders at unity, adjust speaker amplifier levels for volume, and use faders for fine tuning the mix. - Your mixer’s preamp should just be flavouring the sound and bringing it into an audible range, not compensating for improper initial gain staging where the SNR is too low. - It’s okay and in fact, normal for you to need to adjust transmitter gain levels a few times because the dynamic range of each presenter/performer is going to vary. - If the dynamic range is too large for a given presenter/performer, you can use a subtle compressor to reduce the variance in gain levels, rather than constantly adjusting the transmitter gain. Just make sure the transmitter isn’t clipping. - Avoid make up gain as a volume tool. Bypassing the compressor shouldn’t result in a big difference in average volume. Dynamics tools are meant to adjust extremes not necessarily averages. - Shure Digital Wireless Kits have excellent preamps. There isn’t a clear advantage to relying solely on your digital mixer’s preamps and this approach can actually cause problems.