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Automatic Fader
http://www.radanpro.com/Radan2400/MiscAudio/IEC%20-%20Automatic%20Fader.htm
Automatic Fader In this circuit, audio fed to the control channel is amplified and rectified by D1 and D2. This dc level activates LED D3 via Q2.
Auto Fade Implementation on Audio Signals
https://www.eeweb.com/auto-fade-implementation-on-audio-signals/
Auto fade is intended for voice over stage where one needs to fade the background audio during the presence of several voice sections. This circuit gives advantage to radio station disc jockeys and for announcements made on top of music in malls to call the shopper’s attention, in hospitals, in airports, and other establishment.
How to Connect a Fader With Audio Input and Output : 14 ...
https://www.instructables.com/How-to-Connect-a-Fader-with-Audio-Input-and-Output/
Here is the setup. You will need split you audio output with stereo to dual mono cable. On one channel you connect the fader, and on another, you connect a speaker. Then you add a sine wave oscillator and a scale changer to fit the value frome fader to the frequency of the sine wave oscillator in your software.
mixer - Digitally controlled audio fader circuit ...
https://electronics.stackexchange.com/questions/146520/digitally-controlled-audio-fader-circuit
Maybe this is an answer: Digital Optical Volume Control with LED and photoresistor (light to seperate circuits, optical pot) Using light to control the 'fades'/volume of each channel by using a LED and photoresistor (s). You can simply control the LED with an Arduino. Because of the LED is driven by PWM, you need to change the PWM frequency.
3 circuits of guitar fuzz box and fader ... - ElecCircuit.com
https://www.eleccircuit.com/simple-guitar-fuzz-effect-circuit-using-ic-741/
Amazon.com: speaker fader control
https://www.amazon.com/speaker-fader-control/s?k=speaker+fader+control
In Wall Speaker Volume Control - Home Audio Smart 2-Channel A/B Dual Channel Speakers Controller Selector Pod Box - Rotary Knob Fader Control Up to (2) Pair of Indoor or Outdoor Speakers - Pyle PVCD15. 4.2 out of 5 stars 322. Save 27%. $19.00 $ 19. 00 $25.99 $25.99. Lowest price in 30 days.
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