Ideas how to make an on/off switch from an audio signal with a piezzo trigger

Hi,

i'm a beginner in the electronic diy world, but i would like to make a box who can mute and unmute audio signal using a piezo as trigger.

i'm a drummer and i use also electronic devices, i'm now using a mixer with mute buttons but the idea would be to control the mute via piezo and be able to use pads instead of pressing by hand on a mixer while i'm drumming.

I saw this video

https://www.youtube.com/watch?v=7NTnDsLUDzQ


and i was wondering if i could combine this circuit to a low pass gate and how the schema would look like. I'm really dumb in schematics, but i'm learning.

https://www.youtube.com/watch?v=8BOnvSQpoGY

maybe there is a better way to do it...?
If somebody have some other ideas or exemple of schematic that could help me i would appreciate a lot...

Thank you in advance!

Hi

Sounds a cool idea to me.

How do you intend to interface the switch pad to the mixer? An easy way would be to simply extend the existing mute button contacts to a connector socket mounted on the side of the mixer, shorting them out would potentially activate the mute. That way you could simply plug in your drum pad when needed.

Not sure why you would need a low pass filter, maybe I'm missing something, but you would definitely need to debounce. When a physical switch closes it doesn't close "clean", it bounces for a few tens of mS opening and closing before settling. This can and does cause havoc in electronics so needs to be managed. Same can be expected for piezo.

I don't have experience with the piezo switch you mention but it obviously settles in desired state if offered as a "simple" On/Off. Try using the output of this on/off switch to control a simple relay, switching contacts Open/Closed upon taps. The "dry" relay contacts connect to the mixer. By dry I mean there is no voltage present on the contacts, they simply act as a switch across whatever is connected.

This could all be quite small and easily powered by battery.

Hope this helps and please let us know how you get on.

Regards

Thanks for your answer.
So my idea would be to have a 6 independent channels box (with 3 jack connector each /1triger in,1 audio in,1audio out) before the mixer. I was thinking of the low pass gate cause it's passive. Anyway I don't own a mixer with mute buttons.
Could you be more precise about the relay thing, maybe some example of schematics can help me?

This is the schema I want to build,
Is it a good one ? or if someone has other suggestions?
Cheers

Hi

Sorry for the delay in replying, I travel a lot and don't have much access. I'll try and have a look at your circuit at the weekend.

Regards