[sdiy] Mute solution?

[Tim Ressel]

We tried the zero crossing method but it does not work if there is no 
signal present.

I should mention our signal levels are +/- 10 volts. The product has 4 
inputs steered to one of 2 outputs, so we need either 8 mutes to 4 mutes 
and 4 DPST switches. The mutes need to be completely clickless. The 
board size is quite small so large circuits are not practical. This is 
why the DS1882 is attractive.

--timbo


On 5/26/2018 1:27 AM, Andre Majorel wrote:
> On 2018-05-24 20:47 +0200, Roman wrote:
>
>> How about detecting zero-zrossing and shutting down the audio
>> with clamping MOSFET or whatever when signal is no more than
>> 1mV away from GND? No clicking.
> If you want to hear what switching at zero-crossings sounds
> like, play the WAV file at
>
> http://www.teaser.fr/~amajorel/gatedsine/
>
> The signal being switched is a low-frequency sine so as not to
> mask the artefact. On a signal with more high frequency content,
> the artefact would be less conspicuous.
>

-- 
--Tim Ressel
Circuit Abbey
timr at circuitabbey.com