Meyer Sound and L-Acoustics: how the choice actually gets made Two manufacturers, one decision, and the four things that settle it on a real job — coverage against the room, weight against the roof, where the amplifier lives, and what the rider says. None of which is which one sounds better. LED wall or projection: how the room settles it One measurement decides this and it is not the size of the projector. Why ambient light raises the black rather than dimming the picture, why a 20,000-lumen projector can land below the lowest published viewing category in a normally lit space, and the four questions that settle it. Micing an orchestra for a live-to-film performance Spot-mic distance and pattern, why the click track reaches the conductor and not every player, and how a pit with no room for a wedge gets monitored instead. Lighting a rock show: reading the rider, building the plot What a lighting rider itemizes, why doubling a beam angle can halve a truss’s fixture count, the circuit and DMX-bus arithmetic behind the plot, and what a support act actually gets against a headliner. IMAG at a corporate event: how it actually works Why a slide-sized wall is not sized for a face, two cameras doing two different jobs, and where the delay in a switched feed actually accumulates before anyone notices it. Reading an event production quote: why two numbers are not comparable Three quotes for the same event, nowhere near each other. Usually that is three documents describing three different jobs, and the difference is sitting in what each one assumes somebody else is bringing. Sizing an outdoor LED wall: weight, draw and how high it may go Once the site is walked, the question is narrower than LED or projection: can the ground, the power and the truck carry what was specified. Four numbers on the panel manufacturer’s own specification sheet answer it, and one of them is a ceiling on height. Mobile stage or modular stage: the numbers that decide an outdoor show A promoter asking for an outdoor stage is asking about trucks and hours. The two structures are rated differently and held to different standards, and the published figures settle it before anyone walks the field. Indoor or outdoor venue: the published figures that decide it Argued about weather, settled by documents. A performing arts centre prints its grid height, line sets and panel amperage; a city prints what it wants in hand and how long before the date. Yamaha CL5, DiGiCo and Allen & Heath: three desks, read against each other Input counts, local connectivity and the format each desk speaks, taken from the three makers’ own published pages rather than from habit. Line array or point source on a festival field: what the spec sheets say One manufacturer publishes both categories inside the same product family. The level gap is two decibels and the weight gap is ten kilograms. Generator or a tie-in on a park site: what two spec sheets decide A 400-amp company switch publishes more current per phase than any towable set in one maker’ silent diesel range below 150 kVA. What time the music has to stop: published noise cutoffs, city by city Four different kinds of document decide the last song here, and neighbouring cities rarely use the same one. The published hours, read off each city’s own code and permit form. What a park permit does not give you The park usually stays open, the right to sell inside the fence may belong to somebody with a contract, and the only lawful stage may be the city’s own. What the permit withholds, city by city. LED video walls in Palm Beach County: 150, 160 or 170 mph One county, three published design wind speeds, and an outdoor wall is engineered to whichever contour its site stands in. With the 180-day parks lead time, what a pavilion actually supplies, and the hour the sound has to stop. General session production: loose chairs or fixed seats On a flat floor the producer draws the egress and the fire marshal approves it. Aisle widths, the 36-foot reach to an aisle, the 200-seat chair rule, and the published factor that turns square footage into a seat count. Road closure or lane closure for a Florida event Shutting a street and borrowing one lane are two applications, two lead times and two signatures. Palm Beach County asks ninety working days to close a county road for over a day; Orlando bars lane closures at peak. Venue in-house AV or an outside production company Venues rarely ban an outside production company. They reserve particular services, and three South Florida convention centers publish three different lists of what the building keeps. Tent or building for a Florida event A building arrives already permitted and already inspected. A tent makes the production the applicant for a structure, and four Florida cities publish four different thresholds for when that starts. Rear projection or front projection: cone, seam and depth Draper publishes the same 1.2 gain on a front surface and a rear one, then a 150° viewing cone on the first and a 30° half-gain angle on the second. That, the 136-inch seam limit and the depth each lens class needs are what settle it. Cyc, scrim or filled scrim: what the certificate costs in height Rose Brand weaves heavyweight muslin to 40 feet untreated, 39 feet 8 inches treated and 32 feet 9 inches inherently flame-retardant. The class a hall accepts is what sets the tallest seamless drop, and the scrim table splits the same way. Indoor or outdoor stage deck: what a load rating leaves out Wenger publishes 125 pounds a square foot on its indoor deck and on its outdoor one, then prints L/75 beside the first and L/150 beside the second. The deflection criterion is the part that differs. Rigging points or ground support: what holds the truss up Global Truss prints three sets of allowable loads for F34 on one sheet, and forbids a bridle without an engineer in writing. A hoist that lifts three tons weighs 158 pounds before the load it is there to lift. Hotel ballroom or convention hall: the production terms A convention center publishes its house power, its door heights and the services it sells exclusively. A hotel publishes square footage and a ceiling height, and leaves the rest to the contract. Why a field gets a second system, not a louder one Sound pressure falls about six decibels every time the distance doubles. What that does to a long room, how a delay position is timed, and why the answer moves by a few milliseconds across a hot afternoon. Your eye adapts. The camera does not. Color temperature decides more than color does, and the moment an event is streamed the lighting stops being an aesthetic decision and becomes an exposure requirement. An outdoor wall is a sail Daylight, wind load and ground support — the three problems that do not exist indoors and decide everything about a wall that does not have a roof over it. The permit is the schedule A public site belongs to everybody until hours before doors. What that does to a build, what a site plan has to show, and why nothing on a park site is provided. The room mix is the wrong mix to send A stream is a second show with its own audience and its own failure modes. Camera positions, redundancy, and the upload a venue can actually sustain for a whole program. A substitution call is a failure, not a negotiation What an advance is for, why a changeover is a scheduling problem before it is an equipment one, and what a backline tech is actually there to do. Eleven questions, and no calculator Two events with the same guest count can differ by a large multiple, and the reasons are physical. The questions a producer asks before quoting anything, in the order they get asked.