Page 2 - Contents
Contents Microphone Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Microphone Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Capsule Size . . . ....
Page 3 - Chapter 1; Microphone Design; Microphone Types; Dynamic microphones; Ribbon microphones; Choosing & Using Microphones
Chapter 1 Microphone Design While all microphones are designed for the common purpose of converting variations in soundpressure to electronic signals, different technologies have their benefits depending upon theapplication.This chapter examines the merits of different design types, capsule sizes, p...
Page 4 - Condenser microphones; Condenser; Capsule Size
have very low output, thereby requiring more electronic gain a factor that necessitateshigh-quality preamp electronics in order to avoid noise. Condenser microphones Condenser mics are the most common for studio use. A thin electrically conductive diaphragm is suspended over a back plate,forming a d...
Page 5 - Small Capsules; Medium Capsules; Large Capsules; The Diaphragm; The Backplate
Small Capsules Small capsules are typically those with diaphragm diameters of less than about 1/2 . Categorically, they are extremely accurate through the audible range of 20Hz to 20kHz. Their poor signal-to-noise ratio, however, requires tricks with electronics and relegates small capsules to being...
Page 6 - Patterns; Cardioid pattern; Omni pattern
invariably prefer the sound of solid brass. Needless to say,we use solid brass backplates in all M-Audio mics. The spacing between the diaphragm and backplate iscritical. In order to avoid problems with barometricpressure, the spacer ring has a break in order to allow airto move freely between these...
Page 7 - Figure 8 or bidirectional pattern; Super-cardioid pattern
Omni also exhibits significantly less proximity effect than cardioids. One result is that omnis aresomewhat less sensitive to the movements of an animated vocalist. Another is that omnis tend tohave less need for EQ. As mentioned earlier, while omnis pick up 360 degrees of sound, they tendto be more...
Page 8 - Top Address vs. Side Address Designs; Microphone Electronics
signal through headphones.That’s because one side of the mic is in phase with the performer (and therefore reinforcing their perception of their own sound) while the other side is not. Addressing the in-phase side while monitoring produces optimal monitoring results. Top Address vs. Side Address Des...
Page 9 - Tubes vs. solid state; Tube electronics
An output transformer and/or amplifier serves as a sort of translator and, in audio, we expect thattranslation to be excellent in order to maintain frequency response, dynamic range, andsignal-to-noise ratio. Just as a professional language translator costs more than someone who justtook a few years...
Page 10 - Solid state electronics; Manufacturing Standards; The story behind affordable matched pairs for stereo-miking
still work.) The theory there is that the tube is used as a sort of processor to “warm” up the sound. The reality is that these are still solid state mics masquerading as tube mics as cheaply as possible. Because of the physics behind tube operation, tube mics have classically been subject to certai...
Page 11 - Higher standards
From a technical perspective, the two mics need to be as identical as possible in frequencyresponse. A flat frequency response implies that there is no deviation in the output level versusthe input level at any and all frequencies across the audible spectrum. While a flat frequencyresponse is theore...
Page 13 - Chapter 2; Caring for Microphones; Shock Protection
Chapter 2 Caring for Microphones High-quality condenser mics like the M-Audio line represent an investment. A few basic tips willhelp ensure a lifetime of excellent performance. Shock Protection As you now know, condenser mics are constructed with extremely thin diaphragms and very hightolerances. A...
Page 14 - Cleaning and Storage
Choosing & Using Microphones 14 Cleaning and Storage Always store a condenser microphone in its case when not in use. Particulate matter such as dustcan attach itself to the diaphragm and cause degradation of performance over time. In most cases,wiping the metal exterior of a microphone down wit...
Page 15 - Chapter 3; Basic Miking Concepts
Choosing & Using Microphones Chapter 3 Basic Miking Concepts Microphone placement is an area in which art meets science. Microphone choice and placement issomewhat subjective, much in the same way that choosing a guitar and amp is a matter of personalpreference. Furthermore, each situation bring...
Page 16 - Large Capsules vs. Medium Capsules; Use of Processing During Recording
Choosing & Using Microphones a proximity effect where the low-mid frequencies increase as the distance between the source andmic decreases. (The proximity effect is not a big issue with omni patterns or medium-sized capsulesof any pattern.) With large diaphragms, then, the placement of the mic a...
Page 17 - The Recording Environment; The Revolutionary New TAMPA Preamp
The Recording Environment Professional studios often have several different acoustic spaces av a i l a b l e f rom small, relatively deadisolation booth to cavernous rooms with natural reflections and long delay times. Home recordistshave fewer options, yet experimenting with recording in different ...
Page 18 - Phasing Issues with Multiple Microphones; Minimize the number of microphones in; Separate the sound sources.
Choosing & Using Microphones 18 common acoustic damping materials for home studio use. Music stands can also be reflectivesomething you can compensate for by simply draping towels over them. While a reasonable amount of absorption is often desirable for isolation, too much damping cancreate an a...
Page 19 - Minimize reflective surfaces.; Avoid boxing in mics.
Minimize reflective surfaces. Hard surfaces like wood floors, smooth walls, windows and mirrors are a common culprit in phase issues because they reflect sound back into the microphone.If things sound odd, try moving the performer and/or mic. Also experiment with damping thosereflections with blanke...
Page 21 - Chapter 4; Stereo Miking Techniques
Chapter 4 Stereo Miking Techniques The use of stereo miking techniques utilizing matched pairs can make all the difference betweenmediocre and outstanding recordings. After all, we listen to the world around us in stereo viamatched pairs of ears. Stereo miking can be used in applications ranging fro...
Page 22 - Blumlein
Choosing & Using Microphones 22 separation and captures more room reflections. In general, the X-Y technique using cardioids yields an accuratestereo image exhibiting minimal acoustic reflections, although the separation is not as significant as some otherstereo miking techniques. Blumlein Named...
Page 23 - Spaced Omni
together to create one side of the stereo signal, andsubtracts the side signal from the mid signal to create theother.The result is a very accurate translation of the stereolistening field. The presence of an M-S balance control inthe encoder also allows the engineer to control the ratioof mid signa...
Page 25 - Chapter 5; Specific Miking Applications; Vocals
Chapter 5 Specific Miking Applications Now that we ve covered some basics, it s time to look at some time-honored guidelines forcommon recording situations.While experimentation is definitely encouraged, these techniques willget you in the ballpark and, more importantly, provide additional understan...
Page 26 - Acoustic Guitar; is very boomy, especially when combined
Choosing & Using Microphones 26 experiment with angling the mic down at the performer s mouth in order to avoid projecting theenergy of the breath directly into the microphone. Also, make certain that the vocalist s headphonesare the closed-cup variety, as open-cup designs tend to leak sound tha...
Page 27 - Electric Guitar
mount is needed to minimize vibrations from tapping feet and the like. In most cases, cardioids are the best choice for miking acoustic guitar.While you can certainly attaingood results with a large diaphragm mic, medium diaphragms are often preferred in order reduceproximity effect. 1. Bridge. Miki...
Page 28 - Drums
Choosing & Using Microphones 28 1. Pop/rock. The closer the mics are to the hammers, the more percussive the resulting sound will be. For thisreason, pop/rock recordings where the piano needs to cutthrough other tracks are often achieved by close-mikingthe hammers. Start by placing a matched pai...
Page 33 - Chapter 6; The M-Audio Family of Microphones
Chapter 6 The M-Audio Family of Microphones At this point, you ve learned a good deal about how microphones work, how they are built and how they aretypically applied. Along the way, we ve occasionally referred to some of the specific models in the Groove Tubesfamily of mics. Here s a brief overview...
Page 34 - Appendix A; Troubleshooting Tips; Problem: No audio from mic; Problem: Audible buzz; Problem: Sound is muffled
Choosing & Using Microphones 34 Appendix A Troubleshooting Tips Please consult the following before calling tech support (or even a friend). Problem: No audio from mic ¥ Phantom power not on. Turn on phantom power on your mic preamp or mixer channel.¥ Gain is too low Make certain the pad is not ...
Page 35 - Appendix B; Contact Information; Music Trades
Appendix B Contact Information M-Audio, formerly known as Midiman, is a leading provider of digital audio and MIDI solutions fortoday s electronic musicians and audio professionals. Founded in 1988, M-Audio now hasindependent offices in the US, Canada, UK, Germany, France, and Japan. M-Audio s abili...