Microphones

Chapter 2. From Analog Sound to Digital Audio 2.2. Microphones What is a microphone? An acoustic microphone is made of at least an electroacoustic transducer (also called capsule), containing the membrane or diaphragm mentioned earlier and a case to hold it which acts as a windshield. When the sound waves hit the microphone, it transmits its energy … Read moreMicrophones

Outboard Gear

Chapter 2. From Analog Sound to Digital Audio 2.7. Outboard Gear What is outboard gear? Depending on the taste and budget of the recording engineer, the amplified electrical tension, representing the signal containing our frequency information, can be directed to outboard gear to pre-process the signal before entering the digital domain through the Analog to Digital … Read moreOutboard Gear

Effects

Chapter 2. From Analog Sound to Digital Audio 2.6. Effects What are effects and how do they help me modify the signal I just recorded? We now know that an audio signal has three characteristics: intensity (or volume), frequency and phase (see Equation 1). Each characteristic can be modified by cleverly placing electronic components in … Read moreEffects

Microphone Preamplifiers

Chapter 2. From Analog Sound to Digital Audio 2.5. Microphone Preamplifiers What is a microphone preamplifier? When the sound has been captured by the microphone (we should say “read by the microphone), it comes out in the form of electrical current tension values. Those values are usually very small since the air pressure moving the … Read moreMicrophone Preamplifiers

Cables

Chapter 2. From Analog Sound to Digital Audio 2.4. Cables Why do I care about cables? Connecting the microphone to whatever comes next in the signal chain is an audio cable. An audio cable is made of conducting material surrounded by shielding material. Its role at this stage is to carry the electrical current generated … Read moreCables

A Note On Impedance

Chapter 2. From Analog Sound to Digital Audio 2.3. A Note on Impedance Once converted into voltage by the microphone capsule, our sound enters the electrical realm; for a clear explanation of how electronics work, see here. We have talked about voltages so far because that is what is physically changed in the processes we … Read moreA Note On Impedance

Signal Chain

Chapter 2. From Analog Sound to Digital Audio 2.1. Signal Chain What does analog mean? A sound generated by an instrument takes the form of an analog pressure wave. The term analog refers to the fact that the pressure varies continuously with some variable, for example the string motion; this is by contrast with a digital signal … Read moreSignal Chain