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Audio Signal Detector/Switch Circuit - DiscoverCircuits.com
http://www.discovercircuits.com/H-Corner/audiosignal%20detector%20switch.htm
Audio Signal Detector/Switch Circuit designed by David A. Johnson, P.E. For some audio systems it is desirable to have an automatic switch circuit turn on other devices, such as an Amplifier, if an audio signal is detected on one line. The hobby circuit below will activate a
PAC ASAI-21 Dual Source RCA Audio Switcher with Signal …
https://www.amazon.com/PAC-ASAI-21-Source-Switcher-Sensing/dp/B004PHUH4I
Perfect when using a video switcher › See more product details Product Description This audio switcher connects two stereo RCA audio sources to one RCA audio input. It uses signal sensing on the second input to detect audio and automatically switches to that input when audio is present Product information Technical Details Additional Information
Amazon.com: Auto-sensing A/V Switch 5-in/2-out : …
https://www.amazon.com/Auto-sensing-V-Switch-5-2-out/dp/B00DSQMVKU
To switch to an audio device (connected to INPUT 1), set AUTO/MANUAL to MANUAL and then press AUX". Also, in manual, item 4 related to using your A/V switch: "Turn on the TV and devices you want to view. Set the switch's AUTO/MANUAL to AUTO.
Auto sensing on/off switch - diyAudio
https://www.diyaudio.com/community/threads/auto-sensing-on-off-switch.334994/
I am looking for a switch that senses the line-level audio signal, switches on an amplifier when there is a signal, and turns the amplifier off when there is no signal for a while. Yes, there is the Rod Elliot #38 circuit, which does exactly that ("Signal Detecting Auto Power-On Unit"). However, I am too lazy to make a PCB for it.
Automatic RCA audio switch? - Audioholics Home …
https://forums.audioholics.com/forums/threads/automatic-rca-audio-switch.114160/
Something that ducks one audio signal when another is present, then returns to the other signal after the second one goes away. This is often used in paging systems with background music. Someone speaks into a mic, the music cuts out. They stop talking and the music cuts back in.
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