|A NEW WESITE IN TOWN: They Value Customer Relationships More than any other Aspect of the Business.
According to the sales director, Bradley A.,”Days of the neighborhood merchants are back for this company. The neighborhood just grew larger.” Customer relationships are as important today as they where 40 years ago. Many modern businesses today focus on deception and false promises to lure you into their website to make a sale. Then you become an order number.
SpiritKaraoke.com promotes audio, karaoke, and DJ equipment for the home or professional use. They focus on quality, affordability, customer service first. Bradley A., Sales director for the company states, “when you care for people, it’s only natural to put them first.”
He goes on to say that he was a senior instructor for a technical college in Wi. For 9 years. The last ten years, he’s been a DJ & KJ producer. His degree is in electronics. He is an author with articles and newsletters along with audio products on the website. Be sure to checkout their about us page.
|Karaoke and DJ Mixing for a Better Sound Is your hobby or profession built around karaoke or dj mixing? If so, this article is for you. First, we will review the generalities of audio mixers and the basic controls used to
mix signal levels from input to output, and finally, how to mix these signals for karaoke
mixers, or dj mixers, to compliment the listening experience for live performances. I have included my experience in doing karaoke shows for nine years and hope it will help improve your experiences as well. Finally, I tie it all together for you, so buckle your seat belts, because we’re going for a audio mixing ride.
1. TYPES of AUDIO MIXERS
There are 3 types of audio mixers on the market as of this writing 1. analog, 2. digital, and finally MIDI software mixers for PCs. Whichever type you choose, they are all basically the same in concept and design, for mixing audio signal levels.
2. YOUR RESPONSIBILITY as a SOUND ENGINEER
It is very important to understand what mixer controls do, and how they control an audio signal. Indeed, audio mixers can be very intimidating at first, but if you break down each set of controls into what we call channel strips, it is easy to control the signals.
Your microphones, players, musical instruments etc., are your input signals to be mixed together, to be processed at the master controls.
The trim controls input levels. They should be turned down at hookup to prevent any feedback associated your inputs. If it is set to high, it distorts the input signal. If set to low, it can make the audio signal non recordable, so it’s easy to see the importance of audio levels. Most mixers use led indicators or bar graphs to show what the levels are. Train your ear to hear the levels of each channel. Level balance is important for a good sound.
Channel strips include knobs for EQ level, or tone controls for each separate channel. Panning controls can be a slide, or knob, and its purpose is to control the separation between left, right, and center channels to the master control. Many new digital mixers have built in effects processors that control echo, reverb, and chorus etc. They can really enhance the sound with a little practice.
3. SETTING LEVELS FOR LIVE PERFORMANCES
Setting your levels for live performances is a constant challenge for audio mixing technicians, karaoke & dj productions.
The one thing that separates a good sound tech. from a bad tech., is the ability to pay attention to the incoming signals, compared to the sound coming out of the speakers & monitors etc. You must notice karaoke and music cds are recorded at different levels, and apply that by paying attention to the output volume, and adjust accordingly. When singers are involved, constant adjustments should be made, so that the music & singing levels are consistent in relation to each other. Singers, depending on confidence, experience, and the type of song played, change with each performance. It’s imperative, to strive for a balanced level, not only for the singer, but the audience.
4. CREATING AUDIENCE PARTICIPATION
I have noticed in all of my shows, people that want to get up and sing but lack the confidence to do so. Here are a few tricks that I have learned along the way.
During the course of your show, indicate that you would be more than happy to sing along with anyone interested in giving it a try. Always compliment singers on their performances with something positive. Offer to give pointers to anyone after the show.
New singers take a while to gain confidence and improve their performances. I Like to sing new songs for the first time, to show them, they don’t have to be perfect.
The way that you respond to paying attention from input to output audio levels have a direct affect on how well your audience or singers will respond to your efforts. Remember, it’s all about having fun and encouraging others to commit to a hobby that has been around for years and continues to grow in popularity. I am promoting shows in city parks, supper clubs and anywhere else families can come to have a good time. Enjoy and God bless you all.
HOW TO UNDERSTAND AUDIO SPECIFICATIONS PART I
This is the first of a series of articles for consumers, interested in understanding, audio specifications. We will start with basic electronic theory in this article. The next article will focus on basic ohms law, and how it is applied to what you learned in basic electronic theory. Armed with the understanding of these concepts, we will take what has been learned to this point, and apply it to components found on Spirit Karaoke's website. When this series of articles is completed, you will have the ability to match and comprehend the meaning of what the ratings are, for different components, and how to match them together for best performance, without having to be concerned with purchasing audio products that do not match. All of the terms will be defined for your understanding, so let's have some fun.
Electricity is in the air all around us, in matter, called the atom. These hydrogen atoms are invisible, but can be proven to exist. An atom is composed of a proton that is positioned in the center of the atom. The proton is the positive source of energy. Circling around the proton, in orbit, like the sun moving around the earth, is what is called the electron or the negative source of energy. We know that the electron and proton exist by using two magnets. The positive or negative sides will repel each other when set together. Finally we come to the popular saying that opposites attract, or in the case of the magnets, a positive put towards a negative side will stick together. You can prove this by shuffling you feet across the carpet. The friction excites the protons in your body so when you touch something, or someone, they become an electron, or negative force, and we all know what happens after that. Voltage is defined as a potential difference, or ability to excite these atoms through a chosen path. For example, a piece of copper wire 2 inches long, is full of atoms that are sitting stagnant or not moving. When a potential difference is applied to the wire, it excites the atoms, so they are ready to work. A piece of copper wire is called a conductor, because atoms will take the path of least resistance, which in this case, is the copper in the wire, another saying used in social life. Opposite of conductance is resistance, or a material capable of opposing what is called current flow. The definition of current is voltage, or potential difference in motion. Current can not be produced, without voltage. Volts are expressed by the letter V., Current is expressed in ampheres or amps. and the letter I for calculating formulas in electronic circuits. Finally, Resistance is measured in ohms, and is expressed with a letter R in calculating formulas.
In summary of what was covered today, let's review what has been defined so far. Hydrogen atoms are all around us. They are in materials, and in the air as well. Each atom contains protons and electrons or positive and negative forces. The basis for electronics is taking these atoms, and cause them to behave in a manner, which is useful for mankind. In this case, we can say it's for all of us audio nuts out there that love the sound of music, and want to know what those specifications mean. The products that we need, in order to be the audio nuts that we are. Finally, by applying a battery or generator to produce voltage, or the potential difference to excite the atoms in a conductor, or in our case, a piece of copper wire. Current causes these electrons to flow within a given path, which in this case is through the wire. Resistance is opposite of conductance, by restricting the flow of electrons, or protons. V= Voltage, I=Current, and R=Resistance. With this knowledge we can move on to OHMS law, which is the subject for my next article. God bless. Bradley Angell
How to Understand Audio Components Part II
In this article, part II of reading audio specifications, I will explain, how the amount of current I, in a circuit, depends on resistance R, and voltage V. If you know 2 of the factors, using Ohm's law, you can calculate the third factor. You will learn the formulas for Ohm's law, and apply them to find each one of these factors.The formula for current is I = V divided by R. If the resistance is kept constant in a circuit, and the voltage is varied, the current is varied in the same proportion. An example of this can be seen in a light bulb. If the light bulb has 10 volts applied to it, a meter will indicate the current at that voltage. As the voltage decreases, the current decreases and makes the light bulb dimmer. I is the amount of current through the resistance across the source of potential difference, or voltage. There has to be a resistance between the plus side, and minus side of a battery. Anyone who has touched both ends of jumper cables together proves this. It is called a direct short to ground in a circuit. Lets connect a 8 Ohm resistor across the plus & Minus side of a 12V battery. How much is the current I. I = 12V divided by R of 8 Ohm's = 1.5A or amps for I. Voltage is calculated by the formula V = I x R. If I equals 1.5A, and R = 3 Ohm's, the voltage will be 4.5V across the resistor.The formula for resistance is R = V divided by I.This is the third and final version of Ohm's law. Let's prove the relationship between these three factors of Ohm's law, In the last problem, voltage was equal to 4.5V. We also know that I = 1.5A, and R = 3 Ohm's. 4.5v divided by 1.5A, has a resistance of 3 Ohm's, proving this relationship.
In conclusion, now, you know how to calculate, I, R, and V in a circuit. We learned that by knowing two factors, the third can be calculated using Ohm's law. We also proved, there is a relationship between all three factors.In my next article, you will learn units of measurement for calculating, mega, kilo, milli, and micro. In addition, we will learn how to calculate power & power dissipation in resistance.
Problems for this article:
1. With 10V across an R of 5 Ohm's what is the current I?
2. When 10V produces 2.5A, R is equal to?
3. With 8A through a 2 ohm resistor, the I x R voltage is?
Answers: 1.) 2Amps., 2.) 4Ohms 3.) 16V
Interpreting Specifications for Audio Electronics III
In this article, we will examine the basic units for technical specifications. Defining and calculating will be covered. We’ll also cover power dissipation in resistance. Finally, all three articles will be tied together by solving problem exercises for review.
1. Multiple & Sub Multiple Units.
Using the basic units, volts, ohms, & amperes are practical in most power circuits. There are many variations of these units, so we’ll focus on what you need to know for reading specifications. In the following chart, I will give you the prefixes, followed by symbols used for them, relation to the basic unit, and finally examples used in specifications.
Prefix - Symbol - Unit - Example
mega - M - 1,000,000 or 1x10 to 6th - 5,000,000 ohms = 5Mohms
kilo - k - 1,000 or 1x10 to 3rd - 18kV = 18,000V
milli - m - 0.001 or 1x10 to -3rd - 48mA = 0.048A
micro - u - 0.000001 or 1x10 to -6th - 15uA = 0.000048A
Before we move on, let’s do a practice exercise on converting units to help your understanding. Change the following to basic units in powers of ten.: 6mA, 5kohms, and 3 uA. The solutions would be: 6 x 10 to -3A, 5 x 10 to 3rd ohms, and 3 x 10 to -6A.
In decimal form, they would be 0.003A, 5,000 ohms, and 0.000003A.
2. Calculating Power in a Circuit and Power Dissipation in Resistance.
The unit for electrical power is the watt (W). 1 watt of power equals the work done in 1 second by 1 volt of potential difference moving 1 ampere. For our purposes, time will be omitted since you will not find it used in specs. Very often.
Power in watts equals volts x amperes or P = V x I. If a toaster 5A from the 120 volt power line. How much power is used? P = V x I or 120V x 5A = 600W (watts).
If you know what the power and voltage is, you can calculate what the current is.
P = V x I so I = P/V. Using the previous problem, I = 600W/120V = 5A. Proving there is a direct relationship between units.
Power dissipation: Heat is produced when current flows in a resistance. The reason is because friction between the free moving electrons (from basic electricity) and atoms obstructs the path of electron flow. This concept lead to using fuses for circuit protection.
This concludes the series of articles on reading specifications for audio circuits. Future articles will include: understanding specs. for microphones, and how to choose a speaker to fit your needs. God bless, Bradley Angell.
Below are some practice problems. Answers can be found on the articles page of our website.
1. With 10V across 5ohms [R] , the current is = 2A.
2. When 10V produces 2.5A, R = 4ohms.
3. With 8 A through a 2ohm resistor = 16V.
4. A current of 2A and a voltage of 25V, P = 50W.
5. Will a 1A fuse work for the above problem? N
Note: All prices in US Dollars