THINK AGAIN! MYTHS, MISCONCEPTIONS and REALITY CHECKS Innovative LED QSC
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a ISSUE 205 APRIL 2019 WWW.MOBILEBEAT.COM THINK AGAIN! MYTHS, MISCONCEPTIONS AND REALITY CHECKS Innovative LED www.innovativeledsales.com QSC .................... www.qsc.com THINK AGAIN! PLAYLIST TECH TALK .................................................................. 6 Ben Stowe, CTS FEATURE ..................................................................... 8 By Staci Nichols FEATURE ....................................................................12 By Kevin Freese A DIFFERENT BEAT .....................................................14 By Stu Chisholm FEATURE ....................................................................16 ADVERTISERS By Magi Graziano Audio-Technica www.audio-technica.com 9 MOBILE MATTERS...................................................... 18 DJ Trivia www.djtrivia.com 15 By Matt Martindale iDJPool www.idjpool.com 11 BRILLIANT DEDUCTIONS ............................................21 Innovative LED www.innovativeledsales.com 2 Mixware www.mixware.net 5 By Mark E. Battersby Mobile Beat Las Vegas www.mobilebeatlasvegas.com 26 PRODJFILES .............................................................. 22 PCDJ www.pcdj.com 13 By Mike Cordeiro QSC www.qsc.com 3 SOCIAL MEDIA KNOWHOW ......................................... 25 Wedding Word Search Call 970-302-0747 25 By Vanessa Joy Publisher Events Director Editorial Assistant / Ryan Burger Jake Feldman Writer Mobile Beat Circulation Manager Rebecca Burger Editor-in-Chief Kitty Harr Events Director Emeritus Dan Walsh Michael Buonaccorso TO ADVERTISE IN MOBILE BEAT OR EXHIBIT AT A MOBILE BEAT EVENT, CALL 515-986-3344 x300 OR EMAIL [email protected] 4 MOBILEBEAT.COM ▷ APRIL 2019 Mixware www.mixware.net TECH TALK Think Again...(Part 1) TECH MISCONCEPTIONS CORRECTED, PART 1 Ben Stowe, CTS TECH TALK Think Again... TECH MISCONCEPTIONS CORRECTED, PART 1 By Ben Stowe, CTS 6 MOBILEBEAT.COM ▷ APRIL 2019 perhaps most unbelievable to me is that 27 years into my career uring the past two-and-a-half decades I have I am still explaining that DMX cable and mic cable are different. D presented, written articles, appeared in videos This one just keeps hanging around, and I don’t know why. Perhaps and have made myself available on industry forums to because both use a 3-pin XLR (at least for most DJ level DMX help DJs better understand how their gear works and fixtures) and the cables otherwise look and feel similar. As my mom get better performance from it. Through the course used to tell me, looks are only skin deep (and trust me, I’m beautiful of answering their questions, I have encountered on the inside, but obviously I didn’t get this job on my good looks). some prevailing myths and I’d like to try to clear I think my mom said that just to make me feel better… but anyway the air a bit on some of them. Here are some of the back to DMX cable. most common misconceptions and misinformation DMX is a digital signal. That’s its first name in fact, Digital. As I find within the DJ industry. I titled this “Part such, it prefers to run on a cable with different capacitive, inductive and resistive properties than an analog signal like microphones. 1” because I’m quite certain there will be more. DMX cable also has different shielding as it is more vulnerable to WATTS = LOUDNESS high frequency interference like RFI. This is not to say that DMX is better than mic cable, it’s just better at carrying a DMX signal. Each This is perhaps the most prevalent and pervasive misunderstanding is built to serve a specific purpose and carry a specific signal. in our industry. I think many DJs ask how many watts a speaker is simply because they don’t know what else to ask. Hopefully reading SIZE MATTERS this article will help you ask more meaningful questions to get the It’s not a myth… at least not when talking about cables and volt speaker that will suit your needs best. drop. All cables present resistance to the signal, and that resistance There is a relationship between watts (power) and loudness is greater when the gauge of the cable is a higher number. The (decibels), but it’s a logarithmic one that critically depends on the higher the gauge number the smaller the cable. For example, a 24 initial sensitivity of the loudspeaker. Since we only gain 3dB every AWG (American Wire Gauge) cable has a diameter of 0.0226 inches, time we double the amount of power we have, it is essential that whereas a 12 AWG wire has a diameter of 0.0808. A very substan- the speaker is as efficient as possible. An example I use in seminars tial difference, especially when we consider cross-sectional area. 24 demonstrates that a 400 Watt speaker with a sensitivity of 101 dB AWG is 0.2 mm2 and 12 AWG is 3.31 mm2. 1M/1W is actually louder than a 1000 Watt speaker with a sensitivity This size difference is reflected in a reduction in resistance to of 96 dB 1M/1W. the flow of electricity. Resistance is different from impedance but Ultimately, it’s decibels that we hear, not watts. There are far for the purpose of this article a simple definition is adequate. 12 more important considerations when choosing a speaker, like AWG has a resistance of approximately 0.002 Ω per foot and 24 frequency response, coverage pattern, weight, decibel output, and AWG 0.026 Ω. This results in a substantial difference in the loss of appearance. Watts are essentially only important for understanding a signal when carried across this wire. That loss is increased with how much power will be needed to run the loudspeaker to its full amperage. This is especially meaningful with passive loudspeakers potential. and power cords. SPEED OF SOUND To summarize, when choosing an extension cord the amperage and the length will determine what is adequate. For a 100’ cable if While the speed of sound is affected by temperature and humidity, sending 2 amps at 120v I can use a 16 AWG cord, but if sending 15 it does not change with frequency. Bass waves move at exactly the amps at 120v I need a 12 AWG cord. If attempting to send that 15 same speed as high frequency waves. Could you imagine what amps 200’ I now need a 10AWG cord, and at 300’ I don’t recommend would happen if that were not the case and you were 200’ back doing it at all. At that point a different power distribution system at a concert? It would sound terrible. My son and I tested this for should be employed. a science fair project, and even though I empirically knew that the speed was the same, the process of scientifically testing and [ I’ve put together a handy, quick reference chart for extension proving this was a fun one. cord sizing and if you contact me ([email protected]) I would be happy to send it to you. ] WIRELESS DMX If you have a misconception you’d like confirmed or clarified, DMX was widely adopted as a standard method of controlling suggest it to the editors and perhaps we’ll break it down in a lights by the early 1990s, and is essentially universal even to this sequel. day. However, the methods of making DMX wireless are not. There are prevailing protocols, but there is no standard. These protocols are proprietary and not interchangeable. Chauvet DFi is different Ben Stowe’s love for electronics began early on and led to from ADJ WiFly is different from Eternal is different from WDMX. years of schooling in electricity, electronics, robotics and lasers. They simply won’t work together. Fast-forward to today, and Ben has built NLFX Professional, a premier gear supplier, and his AV installs have been featured DMX CABLE VS MIC CABLE in almost every major industry trade magazine. He holds a Some of the things in this article might be unbelievable to you (like number of certifications and accreditations, including the InfoComm CTS. the idea that an increase from 1 watt to 2 watts gives you the same 3dB increase in loudness as 1000 watts to 2000 watts), but what is MOBILEBEAT.COM ▷ APRIL 2019 7 FEATURE To Sync or Not to Sync THE CONTROVERSIAL BUTTON DIVIDING DJS By Staci Nichols “No successful DJ or mix artist has ever felt threatened by the sync UNDERSTANDING THE PLAYERS: PERSONALITY DJS VS button or the growth of technology.” - Pri Yon Joni MIXING DJS The anti-sync-button crowd believes using the sync button means egardless of whether you use the sync button or a DJ is lazy or unskilled. Mostly they are looking at the DJs who use R not, you have no doubt heard the strong sentiments controllers, play full songs—usually radio edits, and do the same simple fade to mix between each song. In my experience, these of the so-called “DJ purists” against it. If you are new type of DJs are “personality DJs.” They entertain by dancing with the to DJing, the notorious button labeled “sync” will crowd, playing games, and acting as a host—in addition to playing automatically match the tempo of your incoming song music. Personality DJs do not aim to entertain with fancy transi- with the tempo of your outgoing one. If both tracks are tions, and the people who hire them are generally not expecting playing, hitting “sync” a set full of scratching and trick mixes. The anti-sync- will make the beats line button crowd are typically up. Sync does not match mixing DJs who entertain the “1” of song A to the with creative music pairings “1” of song B. It does and song transitions—many of them have little to no not know where two microphone or hosting skills songs should be mixed since it’s not their focus. together. It doesn’t Instead of shaming one side know if two songs are or the other by measuring compatible to blend them with the wrong ruler, let’s simply understand our together.