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Is an analogue audio signal DC or AC? - Factual Questions ...
https://boards.straightdope.com/t/is-an-analogue-audio-signal-dc-or-ac/474740#:~:text=DC%20is%20generally%20understood%20to%20be%20constant%2C%20and,frequency%20range%20of%2020%20Hz%20to%2020%2C000%20Hz.
Are Speakers AC or DC? Here’s The Truth – Stamp Sound
https://stampsound.com/are-speakers-ac-or-dc-heres-the-truth/
Audio signals are always alternating current electrical signals. In terms of strength, microphone signals are the weakest form of audio signals, while …
Is an analogue audio signal DC or AC? - Factual …
https://boards.straightdope.com/t/is-an-analogue-audio-signal-dc-or-ac/474740
Thus, an analog audio signal can be either pure AC or AC with a DC bias. If audio has a DC bias it was added by the electronic circuit because the original audio never has any DC component. Audio is pure AC with no DC bias. (BTW, my computer audio card adds a strong DC bias which I later have to remove. It stinks.)
Why are audio signals AC not DC? - Quora
https://www.quora.com/Why-are-audio-signals-AC-not-DC
Computers do change direction on the output of their analog audiosignal. In fact audio signals are varying AC signals. They do not change direction on their digital outputs (incl. digital audio), because those are digitally coded signals with two DC states.
AC vs DC coupling: What is it? – Noise Engineering
https://noiseengineering.us/blogs/loquelic-literitas-the-blog/ac-vs-dc-coupling-what-is-it
That signal might be alternating current (AC) or direct current (DC). AC signals will come from things like audio oscillators: oscillators make signals that move up and down, generally pretty fast. DC signals will come from places like sequencers, offset generators, or LFOs: unlike audio oscillators, they’re static and they don’t move (or least not very fast).
Do headphones run on AC or DC? | Headphone Reviews …
https://www.head-fi.org/threads/do-headphones-run-on-ac-or-dc.502827/
People usually use "DC" and "AC" refer to the power supply input type accepted (and typical dynamic headphones aren't powered by an external source). This is different than the audio signal. The audio signal definitely changes over time, so it's AC in that sense.
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