A sound reinforcement system is the combination of microphones, signal processors, amplifiers, and loudspeakers in enclosures all controlled by a mixing console that makes live or pre-recorded sounds louder and may also distribute those sounds to a larger or more distant audience.

Stage lighting is the craft of lighting as it applies to the production of theater, dance, opera, and other performance arts. … In addition to basic lighting, modern stage lighting can also include special effects, such as lasers and fog machines.

DMX 512 भनेको (Digital Multiplex) बहु आायामीक तरिकाले काम गर्ने पद्द्ती हो ।
डिजिटल सञ्जाल सञ्चालनको लागि एक मानक (data value) घट बढ विधि हो जुन सामान्यतया प्रकाश (Light Intensity) र अवस्था नियन्त्रण (stage controlling) गर्न प्रयोग गरिन्छ। यो मूलत light नियन्त्रण को लागि मान (value) घट बढ विधि को तरीकामा बनाइएको थियो ।

DMX 512 मा 512 वटा च्यानल हरू हुन्छन् । हरेक च्यानलको मानहरू (Value) 0 देखी 255 सम्म हुन्छ । त्यस मध्य value 128 लाइ बिचको मानिन्छ । प्रत्यक channel को प्रत्यक value ले फरक किसिमको काम (Function) गर्दछ ।

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DMX 512 मा एउटा XLR आउपुट बाट 32 वटा सम्म मात्र Link गर्न सकिन्छ । त्यो भन्दा बढी गरेमा signal loss हुने, control नहुने इत्यादी हुन सक्छ । त्यसमा पनी cable को quality 100% copper छ भने मात्र 32 वटा Link गर्न हुन्छ नत्र भने बिभिन्न समस्याहरू आउन सक्छ ।

In sound recording and reproduction, and sound reinforcement systems, a mixing console is an electronic device for combining sounds of many different audio signals. Inputs to the console include microphones being used by singers and for picking up acoustic instruments, signals from electric or electronic instruments, or recorded music. Depending on the type, a mixer is able to control analog or digital signals. The modified signals are summed to produce the combined output signals, which can then be broadcast, amplified through a sound reinforcement system or recorded.

Mixing consoles are used in many applications, including recording studios, public address systems, sound reinforcement systems, nightclubs, broadcasting, television, and film post-production. A typical, simple application combines signals from microphones on stage into an amplifier that drives one set of loudspeakers for the audience. A DJ mixermay have only two channels, for mixing two record players. A coffeehouse‘s tiny stage might only have a six channel mixer, enough for two singer-guitarists and a percussionist. A nightclub stage’s mixer for rock music shows may have 24 channels for mixing the signals from a rhythm section, lead guitar and several vocalists. A mixing console in a professional recording studio may have as many as 96 channels.^[1]

In practice, mixers do more than simply mix signals. They can provide phantom power for condenser microphones; pan control, which changes a sound’s apparent position in the stereo soundfield; filteringand equalization, which enables sound engineers to boost or cut selected frequencies to improve the sound; dynamic range compression, which allows engineers to increase the overall gain of the system or channel without exceeding the dynamic limits of the system; routing facilities, to send the signal from the mixer to another device, such as a sound recording system or a control room; and monitoring facilities, whereby one of a number of sources can be routed to loudspeakers or headphones for listening, often without affecting the mixer’s main output.^[2]Some mixers have onboard electronic effects, such as reverb. Some mixers intended for small venue live performance applications may include an integrated power amplifier.