Audio Muting Relays

Muting Relay PCB - Pete Millett's DIY Audio pages

http://www.pmillett.com/muting_relay_pcb.html

Muting relay PCB NOTE: The BOM and schematic incorrectly calls out 1N5821 rectifier diodes. These don't mechanically fit on the PCB. use 1N5817 or silimar 1A diodes instead. With cap-coupled preamps and single-ended power amps in …

Muting Circuits For Audio - sound-au.com

https://www.sound-au.com/articles/muting.html

The most common relay will be a miniature DPDT (double-pole, double-throw) type, and a single relay can mute both channels of a stereo preamp. Naturally the relay has to be powered for as long as the signal is required. A typical small signal relay might draw around 12mA or so (assuming a 12V coil and a 1k coil resistance).

Muting Relay ..... buzzing | diyAudio

https://www.diyaudio.com/community/threads/muting-relay-buzzing.143808/

swap the relay and it's diodes up to the 100r position. Move the 100r down. Add an electrolytic from the top of the switching transistor to the bottom side of the relay, where it now meets that 100r. The cap can be ~22uF and 35v. It charges up to the supply voltage and when the transistor switches it allows a high current pulse to fire the relay.

Muting Relay PCB | Audio Science Review (ASR) Forum

https://www.audiosciencereview.com/forum/index.php?threads/muting-relay-pcb.21591/

PAGING CONTROLLED RELAY | Radio Design Labs

https://www.rdlnet.com/blog/tips/paging-controlled-relay/

The RDL TX-PCR1 Paging Controlled Relay can accomplish these chores and more. Simply connect the input of the TX-PCR1 to any 25 V, 70 V or 100 V (8 Ohm up to 75 Watts) speaker line, adjust the sensitivity and delay and you are ready to control just about anything through a set of DPDT relay contacts. Need more contacts? Not a problem!

inviting input on relay controlled power and muting | diyAudio

https://www.diyaudio.com/community/threads/inviting-input-on-relay-controlled-power-and-muting.379362/

relay 1: Secondary 1 to NO - COM to +200VDC PSU. relay 2: Secondary 2 to NO - COM to -200VDC PSU. relay 3: Signal Output 1 NC - COM to ground. relay 4: Signal Output 1 NC - COM to ground. Relays 1 and 2 come on at 30 sec, relays 3 and 4 at 40 sec. I have a basic sketch that seems to work.

Audio output muting circuit - All About Circuits

https://forum.allaboutcircuits.com/threads/audio-output-muting-circuit.177462/

I wanted to get rid of this with a muting circuit of some sort but i really can't find good informations about it around. some say don't use relays, some say don't use Jfet.. My application is stereo and the idea was to tie a Spdt Relay to the psitive rail so that when the power goes off, the switch will connect each output to ground via a 100k ...

OUTPUT MUTING IN HEADPHONE AMPLIFIERS & PORTABLE …

https://media.cotorelay.com/wp-content/uploads/2014/05/15100712/AudioOutput1_ProductSheet-1.pdf

Two concerns that may occur over the use of CotoMOS® relays on the output of high- performance audio ampli˜ers are the amount of added harmonic distortion, and the level of output muting. The audio distortion analyzer graphs presented here show that the CotoMOS® CT128/CS128 relay produces only negligible distortion

Audio/Power & Control Interface for Use with WTSD Wall ...

https://www.atlasied.com/wtsd-pwhub

The WTSD-PWHUB provides an emergency audio mute for fire systems and two NO / NC relays, one that is activated automatically by the auto sleep function and one that can be manually activated by a local latching “System Priority” button on the WTSD-MIX31K or WTSD-MIX41K.

Audio Activated Delay Switch Using Transistors - DIY …

https://circuits-diy.com/audio-activated-delay-switch-using-transistors-diy-project/