uw03

UW Course Outline
Microphones

London Bridge Studios

A. The Transducer

1. The overall sound of an audio signal will be no better than the “weakest link” in its signal path.
2. The “psychology” of microphone pickups
– There is a psychology but there are no rules
– The “Good Principle”

B. Microphone Design

Note: Emiliano told us about a link to a booklet on mics from Neumann … Here’s a download link to that booklet.

1. Dynamic
– Magnetic Principles of operation
– Whenever metal cuts across a magnetic field, a current (of a specific intensity and direction) is “induced” into the metal… conversely, whenever a current is introduced into metal a magnetic field (of a specific intensity and direction) will be set up.
How Loudspeakers work

2. Ribbon

3. Condenser

– Q=CV
– powered condenser
– electret

3. Microphone characteristics

– directionality
▪ omni
▪ cardioid
▪ figure 8 (bi-directional)

– frequency response

– to EQ, or not to EQ… chosing the right mic

– proximity effect

– rumble (p.108)

– transient response

– pop-filtering
▪ wind screen
▪ popper-stoppers (stocking stuffers)

– output characteristics

– sensitivity/noise

– overload capacity

– input trim/padding

– impedance (resistance)
▪ mics are ~200
▪ lines are high Z

– balanced lines
▪ advantages
▪ phantom powering

– unbalanced

Mic Mods & affordable mics

microphone-parts.com

▪ search ebay for mxl v76g and x67g mods
▪ mxl revelation (affordable tube)

C. Mic Preamps

C. Professional Microphone Techniques Book

1. group discussion – Talk about some of your favorite mics and techniques

D. Microphone Techniques

1. Really, folks, it’s mostly a matter of common sense
– Stick to MRT-9 so as not to go over (pp. 118-148)

2. Working Distances (PP. 125-144)
– distant
– close
– accent
– ambient
– general ideas about “workin the room”

3. Phase Relationships

– Al Schmitt

4. Stereo Techniques
– XY
– Blumlein
– Decca tree

– MS
– hardware matrix
– plug-in matrix

5. reamp

– p. 137-138

– Use of room simulation plug-ins to help with re-amping

6. Surround Techniques

– XY
– Blumlein

7. Recording Direct
– DI Box
– Mixing the signals (surround)

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