Hi there,
I found this project a while ago and decided to build it myself as it would perfectly serve as a monitoring console for my band. The idea is to connect each input with each output so I can decide about multiple monitoring mixes.
1) http://sound.westhost.com/project129.htm
2) http://sound.westhost.com/p129-f1.gif
In attached pictures you will find my version of it. I used the same pot(100k)/res(15k) values as in the source project:
As I tried to test it there was no signal coming at the output. After double checking the description I found this:
What I have done is basically an passive aproach to it. I found also many similar web project that didn't require the opamp/mixing stage. Just to mention a few of them:
3) https://youngrites.wordpress.com/2012/11/24/4-channel-passive-matrix-mixer/
4) http://forum.noiseguide.com/viewtopic.php?t=13005
5) http://www.talkbass.com/threads/the-4x4-matrix-mixer-fx-junkies-you-need-to-see-this.990222/
Can I somehow make it working without building the additional stages? The input will be fed with a line-level signal comming from my main mixing console direct outputs. Other name of this device would be a pre-fader aux expander. The output of the matrix/expander will be routed to a four channel headphone mixer, so that everybody will get her own headphone monitoring mix. Hope this makes sense to you. btw my first post here
Cheers,
Marek
I found this project a while ago and decided to build it myself as it would perfectly serve as a monitoring console for my band. The idea is to connect each input with each output so I can decide about multiple monitoring mixes.
1) http://sound.westhost.com/project129.htm
2) http://sound.westhost.com/p129-f1.gif
In attached pictures you will find my version of it. I used the same pot(100k)/res(15k) values as in the source project:
As I tried to test it there was no signal coming at the output. After double checking the description I found this:
Although each input and output is shown directly connected, this isn't the way it's done in practice. All inputs must be buffered with an opamp that has enough output capability to drive all the pots for that row (or column, depending on how you arrange it), and the outputs need to be fed into a proper mixing stage.
What I have done is basically an passive aproach to it. I found also many similar web project that didn't require the opamp/mixing stage. Just to mention a few of them:
3) https://youngrites.wordpress.com/2012/11/24/4-channel-passive-matrix-mixer/
4) http://forum.noiseguide.com/viewtopic.php?t=13005
5) http://www.talkbass.com/threads/the-4x4-matrix-mixer-fx-junkies-you-need-to-see-this.990222/
Can I somehow make it working without building the additional stages? The input will be fed with a line-level signal comming from my main mixing console direct outputs. Other name of this device would be a pre-fader aux expander. The output of the matrix/expander will be routed to a four channel headphone mixer, so that everybody will get her own headphone monitoring mix. Hope this makes sense to you. btw my first post here
Cheers,
Marek