Ordinarily a passive mixer circuit is pretty straight forward, just a series of mixing resistors from the sources (such as: http://www.tkk.fi/Misc/Electronics/circuits/linemixer.html )
This works when both sources are connected. But the problem is that the attenuation of a source changes depending on the number of sources connected. For example, in a 2-ch mixer, each input is attenuated by half, if you unplug one source then the attenuation ceases and suddenly you get an output that is 2x as loud.
Does someone have a reference to a passive mixer circuit that has a consistent attenuation whether or not the inputs are connected?
Thanks.
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Danny
This works when both sources are connected. But the problem is that the attenuation of a source changes depending on the number of sources connected. For example, in a 2-ch mixer, each input is attenuated by half, if you unplug one source then the attenuation ceases and suddenly you get an output that is 2x as loud.
Does someone have a reference to a passive mixer circuit that has a consistent attenuation whether or not the inputs are connected?
Thanks.
--
Danny
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