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ｐｅｎｇｕｉｎＤＪ (gentoop@social.mikutter.hachune.net)'s status on Sunday, 14-Jul-2024 18:38:33 JST ｐｅｎｇｕｉｎＤＪ
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- lamp
@lamp Side chain the amplitude level to go up when the other track (ambient noise from a mic) goes up. Real time mixer.

In conversation about 4 months ago from social.mikutter.hachune.net permalink
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  ｐｅｎｇｕｉｎＤＪ (gentoop@social.mikutter.hachune.net)'s status on Sunday, 14-Jul-2024 18:38:33 JST ｐｅｎｇｕｉｎＤＪ
  in reply to
  - lamp
  @lamp I don't see any hardware implementation but it is doable in a daw. Fairly certain you wouldn't want to lug around a computer in a car.
  I'm thinking a effects plugin aux in with aux out. So something like a guitar effects sidechaining plugin but with adapters. Typically they want to cut one sound out over the other sound but for this case one sound gets boosted while the other can't be cut (the mic).
  
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  niconiconi (niconiconi@mk.absturztau.be)'s status on Sunday, 14-Jul-2024 18:38:33 JST niconiconi
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  - lamp
  @gentooP@social.mikutter.hachune.net @lamp@kitty.haus "I don't see any hardware implementation but it is doable in a daw."It's truly the dark age of analog electronics... It's called Automatic Gain Control circuit, was invented 100 years ago, and was the basic circuit found in all analog radio receivers and TVs, so its hardware implementation is well-known and described in all books about radios. One problem though, AGC is usually slow reacting because you don't want a volume that keeps fluctuating. For this particular application it must have a small time constant so it's a balance between how fast and how "flaky" it is. https://en.wikipedia.org/wiki/Automatic_gain_control
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    Automatic gain control
    
    Automatic gain control (AGC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input. The average or peak output signal level is used to dynamically adjust the gain of the amplifiers, enabling the circuit to work satisfactorily with a greater range of input signal levels. It is used in most radio receivers to equalize the average volume (loudness) of different radio stations due to differences in received signal strength, as well as variations in a single station's radio signal due to fading. Without AGC the sound emitted from an AM radio receiver would vary to an extreme extent from a weak to a strong signal; the AGC effectively reduces the volume if the signal is strong and raises it when it is weaker. In a typical receiver the AGC feedback control signal is usually taken from the detector stage and applied to control the gain of the IF or RF amplifier stages. How it works The signal to be gain controlled (the detector output in a radio) goes to a diode...
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  lamp (lamp@kitty.haus)'s status on Sunday, 14-Jul-2024 18:38:35 JST lamp
  
  Is there a device you can plug in between an audio line to automatically adjust volume to keep it sounding the same? In a noisy environment like the car, some songs are too quiet one moment so the volume has to be turned up to hear, and then the next moment it's too loud and it has to be turned down.
  
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