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Random Nonsense / Geek Stuff All those random tech ramblings you can't fit anywhere else! |
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06-02-2004, 12:01 PM | #1 |
Cooling Savant
Join Date: Mar 2002
Location: Mass
Posts: 185
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Wiring up something... need help
I am making a sound mixer of sorts... inputs are cd player, mic's, tape player... all needing to go to an output of a master volume knob...
I was wondering if it be possible to use something so that the sound doesn't travel backwards... the power of the sound i guess is what i mean...
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fr33t3chi3 |
06-02-2004, 12:49 PM | #2 |
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?!?
You normally mix the various lines before amplifying it. What do you mean by "sound doesn't travel backwards"? |
06-02-2004, 12:56 PM | #3 |
Cooling Savant
Join Date: Mar 2002
Location: Mass
Posts: 185
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the power travel back up the other line...
what i mean is i am pre mixing... creating a mixer then amping the output...
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fr33t3chi3 |
06-02-2004, 02:55 PM | #4 |
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Ah, you're talking about isolating the various inputs from each other?
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06-02-2004, 03:44 PM | #5 |
Cooling Savant
Join Date: Mar 2003
Location: MO
Posts: 781
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You'd need to make an amplifier circuit. At the minimum, something along the lines of a variable gain diffence amp for each input, then feeding those into a summing amp.
In case you have no idea what I'm talking about, National Semiconductor has some good app-notes for their op-amps. Start with AN-20 "An Applications Guide for Op Amps". If you value your time and audio quality, buying something professionally made is best. |
06-03-2004, 06:34 AM | #6 |
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Radio Scrap sells these pretty cheap, and work fine: it was my first one.
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