Virtual earth summing with transformer | GroupDIY Audio Forum
![BUILD] "Unison Design" Passive Summi...](https://img.scoop.it/PR8AsKLwbikUAAIWyHvc5oXXXL4j3HpexhjNOf_P3YmryPKwJ94QGRtDb3Sbc6KY "BUILD] \"Unison Design\" Passive Summi...")
BUILD] "Unison Design" Passive Summi...
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![LMNC Super Simple Mixer [Strip Board Layout + BOM] - #18 by fredrik - DIY STUFF - Look Mum No Computer Thingies](https://canada1.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/0/01fc5040d6a608eb880ef560181ebeff89020b32.png "LMNC Super Simple Mixer [Strip Board Layout + BOM] - #18 by fredrik - DIY STUFF - Look Mum No Computer Thingies")
LMNC Super Simple Mixer [Strip Board Layout + BOM] - #18 by fredrik - DIY STUFF - Look Mum No Computer Thingies
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How to Build a DIY Passive Summing Box – DIY Recording Equipment
How to Build a DIY Passive Summing Box – DIY Recording Equipment
operational amplifier - Audio mixer design - Electrical Engineering Stack Exchange
