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Voice-over recording and podcasting setup centered on the RE20 microphone. The RE20 has been used by many voice-over artists, some working from home studios. [18] Its lower sensitivity requires higher gain from the mic preamp, or an inline gain booster. [19] Podcasting became popular around 2005, often recording at home.
Automixers balance multiple sound sources based on each source's level, quickly and dramatically adjusting the various signal levels automatically. [2] Automixers are used in live sound reinforcement to maintain a steady limit on the overall signal level of the microphones; if a public address system is set up so that one microphone will not feed back, then, in general, the automixer will ...
It is possible to boost the microphone volume by applying software-based gain; however, this is at the loss of audio quality. Low THD hardware and dual-microphone noise suppression help clean up the noisefloor to allow software-base gain with less of an impact to audio quality. [citation needed]
In either instance, the purpose of the microphone preamplifier is the same. A microphone preamplifier is a sound engineering device that prepares a microphone signal to be processed by other equipment. Microphone signals are often too weak to be transmitted to units such as mixing consoles and recording devices with adequate quality
Another type of normalization is based on a measure of loudness, wherein the gain is changed to bring the average loudness to a target level. This average may be approximate, such as a simple measurement of average power (e.g. RMS), or more accurate, such as a measure that addresses human perception e.g. that defined by EBU R128 and offered by ReplayGain, Sound Check and GoldWave.
These "Hi-Z" or "instrument" inputs generally have higher gain than a line input. They are designed to be used with, for example, electric guitar pickups and " direct injection " boxes. Some of these sources can provide only minimal voltage and current and the high impedance input is designed to not load them excessively.