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What Is Analog Input

Analog inputs is connectors for analog signal (guitar, microphone, sinthesizer) incoming to audio card.

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1. Line input is connector for input to sound card signals with standard level (250 millivolts = 250 mV = 0.25 volts). Sources: output mixer, synthesizer, tape, CD-player, etc.

Line Inputs

2. Microphone input Signal from mic input is amplified by microphone preamplifier.

Microphone Inputs

Microphones divided two types: dynamic and condenser (electret).

Microphone output signal is very weak. So we will not hear microphone connected to line input. Some condenser microphones have internal preamp.

Dynamic microphone does not need power. Amateur electret microphones are often powered by batteries, placed in the microphone.

Impedance of mic input is 600 Ohm.

Professional condenser microphones require feeding a so-called phantom power 48 V.

Phantom Power 48V

Phantom power is supply voltage passed audio signal wires.

Therefore, if you are going to use a condenser microphone, there are 2 options:

      a) Buy sound card with integrated microphone preamplifier supporting phantom power.

      b) If the card has only line outputs, you have to purchase a mic preamp that provides phantom power.

Microphome Preamplifier

3. Instrumental input (Hi-Z) is connector for guitar or bass guitar. It allows more fully consistent sound card impedance with guitar pickups for whole frequency range (more uniform frequency response).

Instrumental Input

Required number of inputs is determined how much you want to record sound sources simultaneously. You can record on one instrument in series or playing simultaneously several parties: vocal group or acoustic drum set, various drums and cymbals are written with several individual microphones.

Read what is analog output here...


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