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Desktop Audio Mixer

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A device that mixes two or more analog audio signals into one analog signal, Does so via multiple inputs with dimmer switches for individual volume control. It should be Audiophile/Studio Quality Sound (I.E Low Noise). Can be either banalced or unbalanced. Is a part of this OSE construction set: http://opensourceecology.org/wiki/Open_Source_Audio_Capture_%2B_Editing_%2B_Reproduction_Construction_Set On this page: http://opensourceecology.org/wiki/Open_Source_Desktop_Audio_Mixer
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Yet to be Fufilled
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Submitted by Eric Lotze on December 12, 2017 - 10:06pm.

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Shane Oberloier's picture
Submitted by Shane Oberloier on January 1, 2018 - 10:52pm

I've started working on this design. A lot of the Audio equipment on your OSE wiki page is going to need a +- supply, so I thought that it would make sense to first design that. So here it is: http://opencircuitinstitute.org/content/plus-minus-5v-power-supply . Here is the basic schematic I'd follow: http://www.electronics-tutorials.ws/opamp/opamp_4.html (scroll down to Summing Amplifier Audio Mixer). I'll probably use these potentiometers for volume control https://www.digikey.com/short/qq1pvp . And I'll use screw terminals for the output. That way you can connect to what ever type of connector you want on the enclosure.