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hardware - Difference between microphone and line in ...
https://sound.stackexchange.com/questions/27539/difference-between-microphone-and-line-in-inputs#:~:text=Line%20in%20will%20usually%20be%20stereo%20and%20about,in%20have%20XLR%20connector%20to%20allow%20Phantom%20Power
What is Impedance in Audio? Input and Output …
https://virtuosocentral.com/what-is-impedance-in-audio/
In audio devices, impedance is the measure of the resistance of a circuit to alternating current (audio signal). It’s measured in Ohms. The “Z” symbol represents impedance. All audio equipment that receives an input and has an output will have impedance measurements, namely input, and output impedances. More on that later.
Understanding Impedance - Sound on Sound
https://www.soundonsound.com/techniques/understanding-impedance
In audio input and output circuits the impedances are principally resistive to make interconnection easier — the impedance won't change too much over the range of audio frequencies. However, the impedance to radio frequency (RF) signals will often be very different to that at audio frequencies in order to keep RF interference out.
What is the audio line-in impedance? - Apple Community
https://discussions.apple.com/thread/306539
The Andrea headset/mic that came with VV is junk, so I purchased a Sennheiser PC 150. Here is my problem: the Sennheiser is not USB, and the PB G4 does not recognize the mic, even through iMic. I believe the difficulty is due to an "impedance gap." The Sennheiser mic is rated at -2 kOhms and I cannot determine the impedance of the PB Line-in.
How important is impedance matching in audio applications ...
https://electronics.stackexchange.com/questions/6846/how-important-is-impedance-matching-in-audio-applications
A line output will be something like 100 Ω, while a line input is more like 10 kΩ. A loudspeaker amplifier will be less than 0.5 Ω, while loudspeakers are more like 4 Ω. A guitar output might be 100 kΩ, while a guitar amp input is at least 1 MΩ. In all these cases, the load impedance is significantly larger than the source; they are not matched.
IMPEDANCE MATCHING IN AUDIO Myth or reality
http://www.townshendaudio.com/PDF/Impedance_matching%20deletraz%20paper.pdf
IMPEDANCE MATCHING IN AUDIO Myth or reality ? Hervé Delétraz . 2 / 24 ... at a speaker impedance curve. 2.1.2 Transmission line An electrical transmission line can be defined as being a device allowing an electric signal to travel from a point A to a point B. In the hi-fi world, it simply means that a transmission line is in fact 2 – or ...
Audio Signal Levels Explained: Mic, Instrument, Line, and ...
https://www.blackghostaudio.com/blog/audio-signal-levels-explained-mic-instrument-line-and-speaker
Most audio interfaces have a high-impedance input, which is often indicated by the text “HI-Z.” If you plug your electric guitar or bass directly into a Hi-Z input on your audio interface, you don’t need a DI box.
audio - What is the impedance of the line/headphone jack ...
https://apple.stackexchange.com/questions/57186/what-is-the-impedance-of-the-line-headphone-jack-on-macbook-pro-retina
When connected headphones with an impedance of less than 150 ohms, the headphone jack provides up to 1.25 volts RMS. For headphones with an impedance of 150 to 1k ohms, the headphone jack delivers 3 volts RMS. This may remove the need for an external headphone amplifier. The built-in digital-to-analog converter supports sample rates of up to 96 kHz.
Audio line driver - Electronic Circuits and Diagrams ...
https://www.circuitstoday.com/audio-line-driver
At 12V supply, a 600 ohm impedance line can be driven at +10dBm with a distortion less than 0.05% at 1kHz. Gain of line 1 can be set using the equation, Gain1 = (R5+R6)/R6. Gain of line 2 can be set using the equation, Gain2 = (R7+R8)/R8. The load at the output must be at least 100 ohms in order to avoid stability issues.
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